True Taste Korea

Kang Seung-woon

  • Why Did Kang Seung-woon Choose Jeong-yo Over His Own Grandson in Four Hands?

    One question in Four Hands: Two Sonatas has become much more interesting after the latest episodes:

    Why would Kang Seung-woon choose Choi Jeong-yo when his own grandson, Kang Bi-o, is already an exceptional pianist?

    At first, the answer seems simple.

    Jeong-yo is a genius.

    But I think the drama is saying something more painful than that.

    Bi-o Is Not Untalented

    This is what makes the story cruel.

    Bi-o is not a mediocre pianist desperately chasing a dream beyond his ability.

    He is a perfectionist who has spent his life studying and practicing, and he is already regarded by leading musicians as one of Korea’s most promising young pianists. Yet there is one person whose approval he has never been able to earn:

    his grandfather, world-famous conductor Kang Seung-woon.

    That changes when Jeong-yo appears.

    After hearing Bi-o and Jeong-yo perform together, Seung-woon finally gives Bi-o a rare compliment.

    But the person who truly catches his attention is Jeong-yo.

    Seung-woon soon invites Jeong-yo to audition for his symphony festival, while Yoon Seon-joo explains that Seung-woon has long been searching for a genuine raw talent.

    That difference matters.

    Bi-o spent years trying to make his grandfather look at him.

    Jeong-yo barely had to ask.

    Reddit Viewers Noticed What Frightens Bi-o

    An interesting interpretation appeared among international viewers on Reddit.

    One viewer argued that Bi-o’s insecurity is not really caused by other people praising Jeong-yo. Instead, Bi-o himself recognizes something in Jeong-yo’s music — a kind of natural magic that cannot simply be acquired through practice.

    I think that observation gets very close to the heart of their rivalry.

    Bi-o knows how hard he has worked.

    He knows how good he is.

    But he also knows what he hears when Jeong-yo plays.

    And perhaps that is why his grandfather’s choice hurts so much.

    Why Would a Grandfather Choose Someone Else?

    The latest development gives us another clue.

    Seung-woon is still capable of conducting, yet he appears willing to make room for Jeong-yo.

    When Yoon Seon-joo questions why he would go so far while he is still healthy enough to remain on the podium, Seung-woon’s answer reveals how he sees talent:

    When God gives someone a gift, that gift also comes with a calling.

    That idea may explain Seung-woon better than anything else.

    To him, music does not appear to be an inheritance that automatically passes from grandfather to grandson.

    Extraordinary talent creates an obligation.

    And if Seung-woon believes Jeong-yo possesses that rare gift, then blood may simply be irrelevant to his decision.

    This also fits what we already know about him. Seung-woon is portrayed as an uncompromising perfectionist who will harshly judge even his own family when they fail to meet his musical standards.

    And Then Jeong-yo Returns as a Conductor

    Nine years later, the choice becomes even more significant.

    Jeong-yo returns not simply as the pianist Bi-o once knew, but as conductor Luca Dominico. The official tvN material now explicitly presents the two meeting again as conductor and pianist.

    Reports on Episode 7 also show that after seeing Jeong-yo’s competition achievements, Seung-woon immediately contacted Yoon Seon-joo, who then approached Jeong-yo about returning as a conductor.

    So Jeong-yo becoming a conductor does not feel like a random twist anymore.

    The groundwork was there.

    Seung-woon had already decided what kind of talent he believed Jeong-yo possessed.

    Maybe Bi-o Never Really Wanted His Grandfather’s Position

    And this is the part I find most heartbreaking.

    Maybe Bi-o never truly wanted to inherit Seung-woon’s position.

    Maybe what he wanted was much simpler:

    He wanted his grandfather to look at him and say, “You are the one.”

    Bi-o practiced.

    He won.

    He became the pianist everyone else admired.

    But the recognition he wanted most kept moving further away.

    Then Jeong-yo appeared — someone Bi-o himself could not dismiss as inferior.

    That makes this more than a rivalry between two musical prodigies.

    It becomes a story about two very different kinds of talent:

    the genius built through relentless discipline, and the genius that seems to exist before anyone teaches it how to speak.

    And Seung-woon appears to have made his choice.

    The more interesting question now may not be why he chose Jeong-yo.

    It may be:

    What will Bi-o do after realizing that the person he spent his entire life trying to impress may never choose him?

    Kang Seung-woon’s preference for Jeong-yo raises questions about talent, family loyalty, and the expectations placed on Bi-o. His decisions become even more intriguing when we revisit the warning he gave Bi-o about someone being destroyed.

  • Four Hands: Are Bi-o and Jeong-yo’s Fathers the Drama’s Biggest Hidden Secret?

    Four Hands has already given us plenty of mysteries.

    Why was Choi Jeong-yo kidnapped?

    Who ordered it?

    Why did he disappear for nine years?

    Why did he return as conductor Luca Dominico?

    And why is he pretending to have lost his memory?

    But after Episode 7, I keep coming back to a different mystery.

    It has been sitting quietly behind the story for much longer.

    Who are the fathers of Kang Bi-o and Choi Jeong-yo?

    More specifically:

    Why has the drama revealed so much about their mothers and families while leaving crucial parts of their paternity unresolved?

    That may not be accidental.

    Jeong-yo’s Birth Secret Has Already Begun

    One part of this theory is not speculation.

    Earlier in the drama, Jeong-yo learned that the man who had raised him was not his biological father.

    The revelation came after his father was rescued from a debt crisis. Instead of embracing Jeong-yo, the man angrily said that Jeong-yo was not his son and that he had been deceived by his wife for ten years.

    That scene did something important.

    It answered one question—

    Is this man Jeong-yo’s biological father?

    No.

    But it immediately created a much bigger one:

    Then who is?

    The drama has not yet given us that answer.

    And in a series already filled with family secrets, that missing name feels increasingly important.

    Bi-o’s Family Story Is Complicated Too

    Kang Bi-o’s family history isn’t simple either.

    The drama has already explored the history surrounding his mother, Kang Ji-hye, and her father Kang Seung-woon. Earlier episodes revealed family conflict connected to Seung-woon’s affair and Ji-hye becoming an unmarried mother.

    Yet the question surrounding Bi-o’s father remains intriguing.

    This matters because Four Hands repeatedly connects the lives of Bi-o and Jeong-yo through the generation above them.

    Their rivalry doesn’t exist in isolation.

    Their mothers matter.

    Their grandfather generation matters.

    Their teachers and patrons matter.

    And the adults around them repeatedly make decisions that change the two young men’s lives.

    So I have started wondering whether Bi-o and Jeong-yo’s connection began before either of them was born.

    What If Their Mothers’ Past Matters More Than We Think?

    This is where we enter theory territory.

    One Korean viewer theory currently circulating suggests that the relationship between the two young men may be connected to an unresolved relationship between their mothers.

    Were the women friends?

    Classmates?

    Musical rivals?

    Or connected through another person we haven’t fully understood yet?

    At this point, the drama has not confirmed such a relationship, so it would be a mistake to present it as fact.

    But the theory becomes interesting because of Kang Ji-hye’s behavior toward Jeong-yo.

    Why Has Kang Ji-hye Been So Threatened by Jeong-yo?

    Ji-hye’s hostility toward Jeong-yo has been unusually intense.

    Earlier in the story, Kang Seung-woon praised Jeong-yo’s instinctive musical talent while criticizing Bi-o’s music as technically perfect but less compelling.

    Jeong-yo actually defended Bi-o, saying that Bi-o had helped him discover his own ability and that Bi-o possessed extraordinary potential.

    Yet Ji-hye still warned Jeong-yo to stay away from her son.

    Now Jeong-yo has returned after nine years.

    And once again, Ji-hye’s reaction is extreme.

    In Episode 7, she strongly opposed bringing Jeong-yo into the Korean Symphony, while Seung-woon argued that Jeong-yo had once pushed Bi-o to grow as a musician.

    Most importantly, Bi-o himself has started noticing that something is wrong.

    He has now asked investigator Martin Vogel to secretly discover who really ordered Jeong-yo’s kidnapping nine years ago.

    And Bi-o’s suspicion is beginning to turn toward his own mother.

    That’s a major development.

    Jeong-yo Wasn’t Simply Bi-o’s Rival

    This is what makes Ji-hye’s hostility harder to dismiss as ordinary parental ambition.

    Jeong-yo and Bi-o certainly competed.

    But Jeong-yo also helped Bi-o.

    Bi-o helped Jeong-yo.

    They played together.

    They influenced one another musically.

    And when Seung-woon praised Jeong-yo over Bi-o, Jeong-yo himself rejected the comparison and defended his friend.

    So why did Ji-hye perceive Jeong-yo as such a serious threat?

    One explanation is obvious:

    She was obsessed with Bi-o’s success.

    Jeong-yo’s natural talent threatened the future she had planned for her son.

    That explanation may ultimately be enough.

    But Four Hands keeps introducing family secrets.

    Which makes another possibility difficult to ignore.

    What if Ji-hye wasn’t only afraid of Jeong-yo the pianist?

    What if she was afraid of what Jeong-yo represented from the past?

    The Missing Biological Father May Be the Key

    Remember what the drama has already done.

    It didn’t merely give Jeong-yo a difficult father.

    It specifically revealed:

    That man is not his biological father.

    From a storytelling perspective, that creates an unfinished question.

    If Jeong-yo’s biological father were irrelevant, the drama could simply leave his family as dysfunctional.

    Instead, it deliberately separated:

    the father who raised him

    from

    the father who created him.

    That usually means the second identity has narrative value.

    And once we ask who Jeong-yo’s biological father is, another question follows naturally:

    Is that person already somewhere inside the story?

    Could the Two Boys’ Families Be Connected?

    This is where the theories can become dangerous, because it is easy to jump too far.

    For example, viewers could speculate that Jeong-yo and Bi-o share a father, or that one of the older male characters is secretly Jeong-yo’s biological father.

    But Episode 7 has not confirmed either idea.

    There is currently not enough evidence to say that Bi-o and Jeong-yo are half-brothers.

    So I would not treat that theory as an answer.

    What we can say is much simpler:

    Both men’s family histories contain unanswered questions, and Jeong-yo’s biological father has deliberately been left unidentified.

    That alone is worth watching.

    Even Their Musical Relationship Could Take on a Different Meaning

    This is where the title Four Hands becomes interesting again.

    At first, the meaning seems obvious.

    Two pianists.

    Four hands.

    One piano.

    Bi-o and Jeong-yo can create something together that neither creates in exactly the same way alone.

    But the drama has increasingly turned their musical relationship into something larger.

    Their lives mirror one another.

    Bi-o has the body to play but struggles psychologically.

    Jeong-yo wants to play but his injured body no longer allows it.

    Episode 7 confirmed that Jeong-yo’s right shoulder was shot nine years ago, damaging the nerves affecting his fingers and forcing him away from the piano.

    One has what the other lost.

    One once envied the other’s natural talent.

    Now Jeong-yo tells Bi-o that he envies the simple fact that Bi-o can still play.

    Their lives keep crossing like two musical lines.

    If the drama eventually reveals that the connection between their families also predates their friendship, their relationship will become even more complicated.

    And Then There Is Kang Seung-woon

    Seung-woon is another character worth watching carefully.

    His interest in Jeong-yo’s talent has always been strong.

    When he heard Jeong-yo play as a teenager, he immediately recognized something different in him.

    He described Bi-o as calculating and Jeong-yo as instinctive—a musician capable of captivating listeners even without technical perfection.

    And nine years later, when Jeong-yo suddenly returns as Luca Dominico, Seung-woon again wants him brought into the Korean Symphony despite Ji-hye’s objections.

    None of that proves a biological relationship.

    A great conductor recognizing a gifted musician is perfectly reasonable.

    But if Four Hands eventually reveals a deeper family connection, viewers may return to these scenes and see them very differently.

    For now, they remain clues worth remembering—not proof.

    Episode 7 May Have Quietly Moved Us Toward the Answer

    Episode 7 focused on Jeong-yo’s supposed amnesia.

    By the ending, we learned that was another deception.

    Jeong-yo remembers much more than he claims.

    He even returned to the childhood hideout where he and Bi-o had played together and watched Bi-o’s old interview about their relationship.

    Meanwhile, Bi-o has begun investigating the kidnapping.

    Those two storylines are moving backward toward the same place:

    nine years ago.

    And once the drama fully opens that period, I suspect the kidnapping will not be the only secret waiting there.

    We may finally learn more about the generation before Bi-o and Jeong-yo.

    My Theory: The Birth Secret and the Kidnapping May Eventually Connect

    For now, this is only my theory.

    I don’t think Four Hands introduced Jeong-yo’s unknown biological father merely for shock value.

    And I don’t think the drama has spent this much time on Ji-hye’s hostility toward Jeong-yo without eventually explaining why her reaction became so extreme.

    The safest possibility is still straightforward:

    Jeong-yo threatened the musical future Ji-hye had constructed for Bi-o.

    But the more interesting possibility is that music is only the surface of the conflict.

    Something may have happened among the parents.

    Something Bi-o doesn’t know.

    Something Jeong-yo may not fully know either.

    And perhaps something Ji-hye desperately does not want revealed.

    So Who Is Jeong-yo’s Real Father?

    We don’t know yet.

    And that is exactly the point.

    Four Hands has already told us who isn’t his father.

    Now it has to tell us who is.

    And when that answer finally arrives, I suspect it may explain much more than Jeong-yo’s birth.

    It may explain why the lives of these two pianists became tangled together in the first place.

    The biggest secret in Four Hands may not be what happened to Choi Jeong-yo nine years ago.

    It may be what happened before Choi Jeong-yo and Kang Bi-o were even born.

    Jeong-yo’s family history may hold clues to some of the drama’s biggest mysteries. But another question is why Kang Seung-woon placed so much faith in Jeong-yo rather than his own grandson. Explore why Kang Seung-woon chose Jeong-yo over Bi-o.

  • Who Did Kang Seung-woon Mean Would Be Destroyed in Four Hands? His Warning to Bi-o Explained

    One of Kang Seung-woon’s most disturbing warnings in Four Hands may also be one of the drama’s biggest pieces of foreshadowing.

    While talking to Bi-o about his relationship and rivalry with Jeong-yo, Seung-woon warns him, in effect, to think carefully about who will ultimately be left completely devastated if the two continue down this path.

    At first, the meaning seems simple.

    Jeong-yo is extraordinarily gifted.

    Bi-o is becoming obsessed with defeating him.

    So the grandfather may simply be warning Bi-o:

    If you continue measuring your entire life against Jeong-yo, the person who will eventually be destroyed is you.

    But after Jeong-yo’s disappearance, his serious right-arm injury, and his eventual return as a conductor, the line feels very different.

    Because physically, the person whose life was shattered appears to be Jeong-yo.

    So who was Kang Seung-woon really talking about?

    Bi-o?

    Jeong-yo?

    Or both of them?

    The Most Obvious Answer Is Bi-o

    The first interpretation is psychological.

    Seung-woon can already see that Bi-o’s rivalry with Jeong-yo is becoming unhealthy.

    Bi-o does not simply want to become a great pianist.

    He wants to defeat Jeong-yo.

    Those are not the same goal.

    A musician focused on becoming better can continue growing regardless of what another pianist does.

    But someone whose goal is to defeat one particular rival becomes emotionally dependent on that rival.

    If Jeong-yo succeeds, Bi-o suffers.

    If Jeong-yo receives praise, Bi-o suffers.

    If Jeong-yo is chosen, Bi-o feels rejected.

    And because Jeong-yo possesses an instinctive musical gift that Bi-o cannot simply reproduce through additional practice, there may never be a point at which Bi-o feels completely secure.

    That is why Seung-woon’s warning makes sense.

    He may already understand that Bi-o is turning Jeong-yo into the measure of his own worth.

    And if that continues, Bi-o could destroy himself even without losing a single competition.

    Bi-o’s Real Wound Is His Grandfather

    There is another reason Seung-woon may have been talking specifically about Bi-o.

    Jeong-yo is not the true source of Bi-o’s pain.

    Seung-woon is.

    Bi-o desperately wants recognition from his grandfather.

    But Seung-woon is not only his grandfather.

    He is also a respected conductor whose musical judgment carries enormous weight.

    So when Seung-woon chooses Jeong-yo for an important musical opportunity, Bi-o does not experience it as an ordinary professional decision.

    He experiences it emotionally.

    To Bi-o, the message feels like:

    Grandfather compared us—and chose Jeong-yo.

    That is why the rivalry becomes so destructive.

    Defeating Jeong-yo becomes Bi-o’s way of trying to reverse his grandfather’s judgment.

    If Bi-o can prove that he is better, perhaps he can finally prove that Seung-woon was wrong not to choose him.

    In that sense, Seung-woon may understand Bi-o’s psychological danger better than Bi-o understands it himself.

    But There Is a Cruel Irony

    Then Jeong-yo disappears.

    And everything changes.

    We later learn that Jeong-yo suffered a serious injury involving his right arm, damaging the future everyone expected him to have as a pianist.

    Suddenly Seung-woon’s warning becomes uncomfortable.

    Because the person who appears to have been most visibly devastated is not Bi-o.

    It is Jeong-yo.

    The natural genius loses the piano.

    The young musician who seemed destined for an extraordinary career disappears from the path he had been following.

    So viewers have to reconsider the warning.

    What if Seung-woon was not talking only about Bi-o?

    Could the Warning Have Been About Jeong-yo?

    This is the darker interpretation.

    Perhaps Seung-woon understood that the rivalry itself was dangerous for both young men.

    Bi-o’s obsession was obvious.

    But Jeong-yo was also being pulled into a competition shaped by adults, expectations and family relationships far larger than either young musician.

    If Seung-woon sensed that the rivalry was becoming destructive, his warning may have had a broader meaning:

    If this continues, someone is going to get badly hurt.

    And eventually, someone does.

    Jeong-yo disappears.

    His right arm is seriously injured.

    His life as a pianist changes completely.

    That does not prove Seung-woon knew the injury would happen.

    There is currently no reason to treat the warning as evidence that he knew the future.

    But dramatically, the line may function as foreshadowing.

    The audience hears a warning about destruction.

    Later, Jeong-yo’s life is literally transformed by physical damage.

    That parallel is difficult to ignore.

    What If Both Bi-o and Jeong-yo Become “Destroyed”?

    This may be the strongest interpretation.

    Perhaps viewers are asking the wrong question.

    Maybe the warning was never meant to identify only one victim.

    Jeong-yo and Bi-o can both become devastated in completely different ways.

    Jeong-yo is physically devastated.

    His right arm changes his future as a pianist.

    Bi-o is psychologically devastated.

    His need to defeat Jeong-yo gradually consumes his relationship with music, his grandfather and himself.

    One loses the ability to follow the musical path he expected.

    The other risks losing the reason he loved music in the first place.

    If that is the structure of Four Hands, Seung-woon’s warning becomes much more powerful.

    There is no winner.

    There are simply two young musicians damaged in different ways.

    The Tragedy Is That Neither Boy Needed to Be the Enemy

    This is what makes the rivalry especially painful.

    Bi-o and Jeong-yo are very different musicians.

    Bi-o represents discipline, precision and relentless effort.

    Jeong-yo represents instinct, freedom and interpretation.

    Those differences do not necessarily have to make them enemies.

    In fact, they could complement each other.

    That may be one of the deeper meanings behind the idea of “four hands.”

    In four-hands piano, two musicians share one instrument.

    Neither can simply play as if the other person does not exist.

    They must listen.

    They must adjust.

    They must understand each other’s rhythm.

    The music works because two different performers cooperate.

    But Bi-o and Jeong-yo move in the opposite direction.

    Instead of learning from their differences, they become defined by comparison.

    Instead of sharing music, they are pushed toward proving who deserves it more.

    That is where the tragedy begins.

    Seung-woon Saw the Problem—But Did He Handle It Correctly?

    This is where Kang Seung-woon becomes a much more complicated character.

    His warning suggests that he recognized the danger.

    He could see Bi-o becoming consumed by the rivalry.

    He may also have understood that the relationship between the two young pianists could end badly.

    But recognizing a problem is not the same as solving it.

    Seung-woon’s own decisions helped give the rivalry its emotional power.

    He chose Jeong-yo for an important musical opportunity.

    From a professional perspective, that may have been fair.

    If he believed Jeong-yo was the correct choice, selecting Bi-o simply because he was his grandson would have been favoritism.

    But Seung-woon was not dealing only with two musicians.

    One of them was his grandson.

    And Bi-o was desperately seeking his approval.

    Seung-woon may have been correct as a conductor while failing to understand what his decision was doing to Bi-o as a grandfather.

    That distinction may be central to his character.

    The Decision Was Fair—The Aftermath May Not Have Been

    This is an important distinction.

    Some viewers may blame Seung-woon simply because he chose Jeong-yo over Bi-o.

    But if Jeong-yo genuinely deserved the opportunity, choosing Bi-o because of family ties would have been the less fair decision.

    The real question is what Seung-woon did afterward.

    Did he recognize how deeply Bi-o had been wounded?

    Did he explain his decision?

    Did he help Bi-o separate musical judgment from personal rejection?

    Did he prevent the rivalry from becoming Bi-o’s entire identity?

    Or did he simply warn him and expect him to understand?

    If Seung-woon saw that Bi-o was heading toward self-destruction but failed to intervene effectively, his warning becomes tragic in another way.

    He knew there was a problem.

    But knowing was not enough.

    Did Seung-woon Know More About Jeong-yo’s Disappearance?

    This is where the mystery becomes much darker.

    After Jeong-yo disappears and later emerges with a life-changing right-arm injury, viewers naturally begin questioning what the adults knew.

    Did Seung-woon know where Jeong-yo went?

    Did he play any role in separating Jeong-yo and Bi-o?

    Did he believe removing Jeong-yo from the situation would protect one or both young musicians?

    And if he did intervene, did something happen afterward that he never intended?

    None of those possibilities should currently be treated as confirmed.

    But his earlier warning makes them worth asking.

    If future episodes reveal that Seung-woon made a major decision involving Jeong-yo before the injury, the meaning of his warning could change dramatically.

    What currently sounds like psychological advice could become the beginning of a much larger tragedy.

    The Simplest Villain Theory May Be Wrong

    There is already a tempting theory:

    Seung-woon removed Jeong-yo so that Bi-o could become No. 1.

    But that theory has a serious weakness.

    Seung-woon had already demonstrated that he was willing to choose Jeong-yo over his own grandson.

    If his only goal were to guarantee Bi-o’s success, he could simply have favored Bi-o from the beginning.

    He did not.

    That suggests the truth may be more complicated.

    Perhaps Seung-woon did interfere.

    Perhaps he tried to separate the two.

    Perhaps he believed he was preventing Bi-o from becoming more obsessed.

    Perhaps he believed he was protecting Jeong-yo.

    And perhaps the consequences were far worse than he expected.

    That would make Seung-woon a much more interesting character than a grandfather who simply wanted his grandson to win.

    Jeong-yo’s Return as a Conductor Changes the Warning Again

    Years later, Jeong-yo returns.

    But he does not return to the piano.

    He appears as a conductor.

    That changes the meaning of “destruction.”

    Jeong-yo’s old future may have been destroyed.

    But Jeong-yo himself was not.

    He found another way back to music.

    That is enormously important.

    The right-arm injury may have ended one version of Jeong-yo.

    It did not end his musical identity.

    In fact, conducting may allow him to transform the instinct that once made him an extraordinary pianist into something even broader.

    He may have lost control of one instrument but gained the ability to shape an entire orchestra.

    So perhaps Jeong-yo is not ultimately the person Seung-woon’s warning describes.

    He was physically broken.

    But he rebuilt himself.

    That Leaves Bi-o

    And this creates perhaps the cruelest possibility of all.

    What if Jeong-yo—the person who suffers the visible physical tragedy—is ultimately able to move forward?

    And what if Bi-o—the person whose body remains intact—is the one who cannot escape the past?

    Then Seung-woon’s warning becomes almost prophetic.

    Bi-o may eventually achieve the success he wanted.

    Jeong-yo may no longer even be competing with him at the piano.

    And yet Bi-o could still remain trapped by the same question:

    Was I ever better than him?

    That is a competition Bi-o can never truly win.

    Because Jeong-yo’s injury ended it before there could be a final answer.

    The Meaning of “Completely Devastated”

    This may therefore be less about physical destruction than identity.

    A person can lose a career and rebuild.

    A person can lose an instrument and find another form of expression.

    But if someone builds his entire identity around defeating another person, what happens when that rivalry disappears?

    Who is Bi-o without Jeong-yo?

    Who is Bi-o if his grandfather never gives him the recognition he expects?

    Who is Bi-o if he becomes successful but still feels second best?

    Those may be the questions Seung-woon was really warning him about.

    The danger was never simply losing a piano competition.

    The danger was losing himself.

    Final Verdict: Who Was Seung-woon Talking About?

    For now, the strongest answer is:

    Bi-o—but the drama may deliberately make the warning apply to both young men.

    Bi-o appears to be the person Seung-woon is directly warning about.

    His obsession with Jeong-yo is already turning music into a test of his own worth.

    But Jeong-yo later suffers the most visible devastation when his right-arm injury destroys his expected future as a pianist.

    That creates deliberate irony.

    Jeong-yo is broken physically but finds another path.

    Bi-o may remain physically capable of playing but risk becoming emotionally trapped by a rivalry that can no longer be resolved.

    If that interpretation is correct, Four Hands is setting up something much deeper than a story about genius versus hard work.

    It is a story about two gifted young musicians damaged by comparison in completely different ways.

    And Kang Seung-woon may have recognized the danger before either of them did.

    The tragedy is that his warning may not have been enough to stop it.

    Kang Seung-woon’s warning is only one piece of the drama’s larger emotional puzzle. Another turning point is Jeong-yo’s injury and his unexpected return to music as a conductor. Read more about why Jeong-yo stopped playing piano and became a conductor.

  • Why Does Bi-o Hate Jeong-yo in Four Hands? The Real Reason Behind Their Rivalry

    Why is Kang Bi-o so obsessed with Choi Jeong-yo in Four Hands?

    On the surface, the answer seems obvious.

    They are rivals.

    Bi-o is the disciplined elite pianist who has spent years perfecting his technique.

    Jeong-yo is the instinctive genius who seems capable of producing extraordinary music almost naturally.

    One has worked relentlessly.

    The other appears to possess something that cannot simply be learned.

    That alone would be enough to create rivalry.

    But Bi-o’s feelings toward Jeong-yo go much deeper than jealousy between two talented pianists.

    Jeong-yo represents the one thing Bi-o desperately wants but cannot earn through practice: recognition from his grandfather, Kang Seung-woon.

    That is why defeating Jeong-yo becomes so important to him.

    Bi-o is not simply trying to become the better pianist.

    He is trying to prove that he deserves to be chosen.

    Bi-o Has Everything Except the Recognition He Wants Most

    Bi-o appears to have many of the advantages associated with an elite young musician.

    He has received serious training.

    He understands competition.

    He has discipline.

    He has ambition.

    And he belongs to a family deeply connected to classical music.

    But there is one problem.

    The person whose recognition matters most to him is not easily impressed.

    His grandfather, Kang Seung-woon, is not simply a family elder.

    He is a renowned conductor and a musical authority.

    That changes the meaning of their relationship.

    When Bi-o looks at his grandfather, he does not only see someone who should love him as family.

    He sees the person whose judgment can confirm whether his entire life of training has been worthwhile.

    Bi-o wants to hear:

    You are exceptional.

    And more importantly:

    I choose you.

    Then Jeong-yo appears.

    Jeong-yo Has What Bi-o Cannot Practice For

    Jeong-yo is dangerous to Bi-o because his talent seems fundamentally different.

    Bi-o’s strength comes from structure.

    Jeong-yo’s strength comes from instinct.

    Bi-o has learned how music should be played.

    Jeong-yo seems able to ask what else the music could become.

    This distinction matters.

    If Bi-o were competing against another technically excellent pianist, he could respond in the way he understands best.

    Practice harder.

    Improve his technique.

    Correct his weaknesses.

    Become more precise.

    But how do you practice your way into someone else’s instinct?

    How do you defeat a person who hears something you do not?

    That is what makes Jeong-yo terrifying to Bi-o.

    Jeong-yo does not simply challenge his skill.

    He challenges Bi-o’s belief that enough effort can guarantee victory.

    The Grandfather’s Choice Changes Everything

    The rivalry becomes much more personal when Kang Seung-woon chooses Jeong-yo for an important musical opportunity.

    This is the turning point.

    If an unrelated conductor had chosen Jeong-yo, Bi-o would still have been hurt.

    But this decision comes from his grandfather.

    That transforms professional rejection into emotional rejection.

    From Seung-woon’s perspective, the decision may have been entirely musical.

    If he believed Jeong-yo was the right person, choosing Bi-o simply because he was his grandson would have been favoritism.

    But Bi-o does not experience the decision as an abstract question of fairness.

    He experiences it as:

    Grandfather looked at both of us—and chose him.

    That is a completely different wound.

    Bi-o Is Not Really Fighting Jeong-yo

    This may be the key to understanding Bi-o.

    Bi-o believes he is competing with Jeong-yo.

    But psychologically, he may actually be fighting his grandfather’s judgment.

    Every time Jeong-yo receives praise, Bi-o hears:

    “You are not enough.”

    Every time Seung-woon recognizes Jeong-yo’s musical instinct, Bi-o feels his own years of effort becoming less valuable.

    Every time Jeong-yo succeeds, the same question returns:

    Why him and not me?

    That is why simply becoming successful may not satisfy Bi-o.

    He needs to defeat Jeong-yo specifically.

    Because if he defeats Jeong-yo, he can finally challenge the judgment that wounded him.

    He can prove:

    Grandfather was wrong.

    Does Bi-o Actually Hate Jeong-yo?

    This is where the word “hate” becomes complicated.

    Bi-o certainly resents Jeong-yo.

    He is jealous of him.

    He is threatened by him.

    He becomes increasingly obsessed with competing against him.

    But Jeong-yo himself may not be the true source of Bi-o’s anger.

    Jeong-yo did not create Bi-o’s need for approval.

    He did not force Seung-woon to choose him.

    And he did not decide that his own talent should become the standard against which Bi-o measures himself.

    In many ways, Jeong-yo simply exists.

    That may be exactly what makes the situation worse.

    If Jeong-yo were deliberately cruel or manipulative, Bi-o could easily justify hating him.

    But natural talent is not an attack.

    Jeong-yo does not need to intentionally hurt Bi-o.

    His existence alone is enough to remind Bi-o of what he fears he lacks.

    Talent vs Hard Work Is Only the Surface

    It would be easy to describe Four Hands as a familiar story about talent versus hard work.

    Jeong-yo is the genius.

    Bi-o is the disciplined competitor.

    But the drama becomes much more interesting if we look beneath that structure.

    Bi-o is not suffering because hard work is meaningless.

    His hard work has clearly made him an exceptional musician.

    The problem is that he has attached his self-worth to comparison.

    It is no longer enough for Bi-o to become great.

    He needs to be greater than Jeong-yo.

    And once success depends on another person losing, there is no easy way to feel satisfied.

    Even if Bi-o wins one competition, Jeong-yo still exists.

    Even if Bi-o receives applause, he can still wonder whether his grandfather secretly believes Jeong-yo is more gifted.

    The rivalry therefore becomes impossible to finish.

    Seung-woon Seems to Understand the Danger

    This makes Kang Seung-woon’s warning about the relationship between Bi-o and Jeong-yo especially important.

    He tells Bi-o, in effect, to think about who will become completely devastated if the rivalry continues.

    That is a remarkable warning.

    Seung-woon appears to understand something Bi-o does not.

    The greatest danger is not losing to Jeong-yo.

    The greatest danger is allowing Jeong-yo to become the measure of Bi-o’s entire identity.

    Because once that happens, Jeong-yo controls Bi-o without even trying.

    If Jeong-yo succeeds, Bi-o suffers.

    If Jeong-yo receives praise, Bi-o suffers.

    If Jeong-yo is chosen, Bi-o suffers.

    Bi-o’s happiness becomes dependent on what happens to someone else.

    That is why Seung-woon’s warning may ultimately have very little to do with a piano competition.

    It may be a warning about self-destruction.

    But Seung-woon Also Helped Create the Problem

    There is an uncomfortable contradiction here.

    Seung-woon may understand that Bi-o’s obsession is dangerous.

    But he is also one of the people whose judgment gave that obsession so much power.

    Bi-o desperately wants his grandfather’s approval.

    Seung-woon knows this.

    Yet his approach appears to remain harsh and uncompromising.

    Musically, that may be understandable.

    A conductor should not lower artistic standards simply to protect his grandson’s feelings.

    But a grandfather has responsibilities that a conductor does not.

    This is where Four Hands becomes more complicated than a simple rivalry story.

    Perhaps Seung-woon was right to choose Jeong-yo.

    But being right about music does not automatically mean he handled Bi-o correctly as family.

    The decision may have been fair while the aftermath was emotionally disastrous.

    Those two things can both be true.

    What Bi-o Really Wanted Was Not First Place

    This may explain why Bi-o’s obsession cannot be solved simply by winning.

    Suppose Bi-o becomes No. 1.

    Would that heal him?

    Probably not.

    Because first place was never the deepest goal.

    Recognition was.

    Bi-o wants someone he respects—especially his grandfather—to look at him and say that all the effort mattered.

    That he is worthy.

    That he is special.

    That he was not second choice.

    Without that emotional resolution, trophies cannot solve the problem.

    Bi-o could stand on the highest stage in the world and still wonder:

    Would Grandfather have chosen Jeong-yo if he were here?

    That is the tragedy of his rivalry.

    Jeong-yo’s Disappearance Does Not Give Bi-o the Victory He Wanted

    Then the story becomes even crueler.

    Jeong-yo disappears.

    Later, we learn that his right arm has been seriously injured and that his path as a pianist has been destroyed.

    In one sense, Bi-o’s greatest rival is gone.

    But this does not necessarily free Bi-o.

    It may do the opposite.

    Because Bi-o never truly defeated Jeong-yo.

    There is no final performance that proves Bi-o was better.

    There is no clean victory.

    The competition simply stops.

    And that leaves Bi-o with a question he can never answer.

    Could I actually have beaten him?

    For someone as competitive as Bi-o, that uncertainty may be worse than defeat.

    Jeong-yo Returns in the One Way Bi-o Never Expected

    This is why Jeong-yo’s return as a conductor is potentially devastating.

    Bi-o may have spent years imagining Jeong-yo as the pianist he needed to defeat.

    But Jeong-yo returns outside that competition.

    He is no longer sitting at the other side of the piano.

    He is standing in front of musicians.

    That changes the relationship completely.

    Bi-o can no longer simply prove himself by playing better than Jeong-yo.

    The old contest may no longer exist.

    And perhaps that is exactly what Bi-o needs.

    For the first time, he may be forced to see Jeong-yo not as an opponent to defeat, but as another musician whose life was also damaged by the past.

    The Cruel Irony of Bi-o and Jeong-yo

    The greatest irony may be that both young men are victims of the same rivalry.

    Bi-o suffers because he believes Jeong-yo has everything he wants.

    Natural talent.

    Recognition.

    Freedom in music.

    Jeong-yo, meanwhile, eventually loses the very thing Bi-o envies most: his ability to continue his life as a pianist.

    Bi-o spends years wanting Jeong-yo’s position.

    Jeong-yo loses that position entirely.

    Neither of them truly wins.

    That may be why the title Four Hands matters so much.

    Four-hands piano requires two players to share the same instrument.

    They have to listen to each other.

    They have to make space for each other.

    Neither performer can simply dominate the entire keyboard.

    Yet Bi-o and Jeong-yo are pushed toward exactly the opposite relationship.

    Instead of playing together, they are taught—directly or indirectly—to measure themselves against each other.

    The tragedy is not that one is talented and the other works hard.

    The tragedy is that two gifted musicians become incapable of seeing each other without competition standing between them.

    Bi-o’s Real Battle May Still Be Ahead

    Bi-o’s final opponent may not be Jeong-yo.

    It may be himself.

    Can he play music without needing to prove that he is better than someone else?

    Can he accept his grandfather’s recognition without depending on it?

    Can he look at Jeong-yo without seeing his own inadequacy?

    And most importantly, can he understand that another person’s talent does not diminish his own?

    If Bi-o cannot answer those questions, defeating Jeong-yo would never have saved him.

    There would always be another rival.

    Another competition.

    Another musician receiving applause.

    Another reason to feel threatened.

    That is why Seung-woon’s warning feels increasingly important.

    The person who becomes completely devastated may not be the person who loses the competition.

    It may be the person who can no longer imagine himself without it.

    Final Thoughts

    So why does Bi-o hate Jeong-yo so much?

    Because Jeong-yo represents far more than a rival pianist.

    He represents Bi-o’s fear that hard work may not be enough.

    He represents the grandfather’s recognition Bi-o desperately wants.

    He represents natural talent Bi-o cannot simply acquire through more practice.

    And most painfully, he represents the moment Bi-o feels that his grandfather looked at two young musicians and chose someone else.

    That is why Bi-o cannot simply ignore him.

    But the deeper tragedy of Four Hands may be that Jeong-yo was never truly Bi-o’s enemy.

    Bi-o’s real enemy is the belief that he can only prove his own worth by defeating someone else.

    And if Kang Seung-woon already understood where that obsession would lead, then his warning about someone becoming completely devastated may be far more important than it first appeared.

    The next question is therefore unavoidable:

    When Seung-woon warned that one of them would end up completely destroyed, was he talking about Bi-o all along?

  • Did Kang Seung-woon Remove Jeong-yo So Bi-o Could Win? Four Hands Theory Explained

    One of the most disturbing theories surrounding Four Hands has emerged after Jeong-yo’s disappearance and unexpected return.

    Did Kang Seung-woon deliberately remove Jeong-yo from Bi-o’s path so that his own grandson could eventually become No. 1?

    At first, the theory sounds possible.

    Jeong-yo was the natural genius standing directly in Bi-o’s way.

    Then Jeong-yo disappeared.

    His right arm was seriously injured.

    His career as a pianist was effectively destroyed.

    And years later, he returns not as Bi-o’s rival at the piano, but as a conductor.

    From Bi-o’s perspective, the greatest obstacle in front of him simply vanished.

    But there is a major problem with this theory.

    Kang Seung-woon had already shown that he was willing to choose Jeong-yo over his own grandson.

    So why would a man who refused to favor Bi-o suddenly destroy Jeong-yo in order to help Bi-o win?

    That contradiction may be one of the biggest clues in Four Hands.

    Why Viewers Suspect Kang Seung-woon

    The suspicion begins with one simple fact.

    Jeong-yo was dangerous to Bi-o.

    Not physically.

    Musically.

    Bi-o had spent years training to become an elite pianist. He possessed technique, discipline and ambition.

    But Jeong-yo had something Bi-o could not easily acquire through practice.

    Natural musical instinct.

    Jeong-yo could interpret music differently. He seemed able to understand and express things that Bi-o had spent years trying to perfect.

    And Kang Seung-woon noticed it.

    That recognition was devastating for Bi-o because Seung-woon was not simply a famous conductor.

    He was Bi-o’s grandfather.

    Bi-o did not only want to defeat Jeong-yo.

    He wanted his grandfather to look at him the way he looked at Jeong-yo.

    That makes Jeong-yo more than a rival.

    He becomes the person standing between Bi-o and the recognition he has wanted for years.

    Then Jeong-yo Suddenly Disappears

    This is where the theory becomes uncomfortable.

    The young genius who threatens Bi-o’s position disappears from the piano world.

    Later, we learn that Jeong-yo’s right arm was seriously injured.

    The injury is severe enough to change the direction of his musical life.

    The pianist who could have competed with Bi-o can no longer follow the same path.

    From the outside, the result appears brutally convenient.

    Bi-o’s greatest rival is gone.

    That naturally raises suspicion.

    Was Jeong-yo’s disappearance simply a tragedy?

    Or did someone benefit from removing him?

    And if someone did, viewers inevitably have to look at the adults who had power over both young musicians.

    Kang Seung-woon is therefore impossible to ignore.

    But Seung-woon’s Earlier Choice Creates a Major Contradiction

    There is one piece of evidence that strongly challenges the theory.

    When Seung-woon had the opportunity to favor his grandson, he did not simply do so.

    He recognized Jeong-yo’s talent.

    More importantly, he was willing to choose Jeong-yo for an important musical opportunity even though he knew how badly Bi-o wanted his recognition.

    That matters enormously.

    If Seung-woon’s ultimate goal was always to make Bi-o No. 1, the easiest solution would have been obvious.

    Choose Bi-o from the beginning.

    He was his grandson.

    Nobody would have been surprised if a grandfather supported his own family.

    Instead, Seung-woon made the more painful choice.

    He chose the musician he believed deserved the opportunity.

    And Bi-o was hurt by it.

    That does not look like the behavior of a man willing to manipulate everything to guarantee his grandson’s victory.

    In fact, it suggests almost the opposite.

    Seung-woon may value musical judgment more than Bi-o’s feelings.

    Was Choosing Jeong-yo Actually the Fair Decision?

    This is an important point because Seung-woon can easily appear cruel from Bi-o’s perspective.

    Bi-o worked relentlessly.

    He desperately wanted his grandfather’s approval.

    Then another young pianist appeared and received the recognition Bi-o believed he had earned.

    Emotionally, it is easy to sympathize with Bi-o.

    But fairness is a different question.

    If Seung-woon genuinely believed Jeong-yo was the better choice, selecting Bi-o simply because he was his grandson would itself have been unfair.

    A respected conductor cannot claim to judge musicians honestly while secretly giving important opportunities to family members.

    So perhaps Seung-woon’s original mistake was not choosing Jeong-yo.

    Perhaps his mistake came afterward.

    Seung-woon May Have Underestimated Bi-o’s Wound

    This may be the more convincing criticism of the grandfather.

    Seung-woon appears to understand music exceptionally well.

    But understanding music and understanding a wounded young man are not necessarily the same thing.

    Bi-o did not experience Jeong-yo’s selection as an ordinary professional defeat.

    To him, it was personal.

    The person making the decision was his grandfather.

    And the person being chosen was the rival who possessed the natural gift Bi-o feared he could never match.

    That combination could destroy a young musician’s self-worth.

    Seung-woon seems to recognize the danger of Bi-o’s obsession with Jeong-yo.

    His warning about their relationship is especially significant.

    He essentially tells Bi-o to think about who will become completely devastated if this rivalry continues.

    That sounds less like a grandfather secretly preparing Bi-o’s victory and more like a man who already sees Bi-o destroying himself.

    Then What Did Seung-woon Mean by That Warning?

    This could become one of the most important lines in the entire drama.

    There are at least two ways to interpret it.

    The first is psychological.

    Seung-woon understands that Jeong-yo is naturally gifted and fears that Bi-o’s obsession with defeating him will eventually destroy Bi-o emotionally.

    In that interpretation, the person who will become “completely wrecked” is Bi-o.

    But there is another, darker interpretation.

    What if Seung-woon already knew that the rivalry between the two boys would eventually lead to something much worse?

    If later episodes reveal that he knew more about Jeong-yo’s disappearance or injury than viewers currently realize, the meaning of that warning could change completely.

    It could become foreshadowing.

    For now, however, the drama has not provided enough evidence to make that conclusion.

    Could Seung-woon Have Removed Jeong-yo Without Causing His Injury?

    There is also a middle possibility.

    The theory does not have to be all or nothing.

    Perhaps Seung-woon did interfere with Jeong-yo’s career.

    That does not necessarily mean he caused—or wanted—Jeong-yo’s physical injury.

    He might have separated the two young pianists.

    He might have cancelled an opportunity.

    He might have believed distance was necessary because their rivalry had become destructive.

    If something later happened to Jeong-yo after that decision, Seung-woon could still carry guilt without being directly responsible for the injury.

    This would fit the drama much better than turning him suddenly into a simple villain.

    Four Hands has repeatedly presented choices that can be reasonable from one perspective and devastating from another.

    Seung-woon could have made a decision he believed would protect the boys—

    only for that decision to contribute indirectly to a tragedy.

    And What About Yoon Seon-joo?

    This is where Seung-woon’s wife, Chairwoman Yoon Seon-joo, becomes extremely important.

    A growing viewer theory suggests that Seon-joo may have helped Jeong-yo after his piano career collapsed and possibly supported his transition into conducting.

    If that theory is eventually confirmed, it creates a fascinating possibility.

    What if Seung-woon pushed Jeong-yo away, while Seon-joo helped him rebuild?

    The husband and wife would then represent two completely different responses to the same tragedy.

    Seung-woon might believe separation was necessary.

    Seon-joo might believe Jeong-yo should not lose his entire future because of what happened.

    Her departure from the household would then become much more meaningful.

    It could reflect not only a marital conflict but also a fundamental disagreement over how Jeong-yo was treated.

    Again, this remains speculation.

    But Jeong-yo’s return as a conductor makes Seon-joo’s role worth watching very closely.

    The Biggest Problem With the “Grandfather Did It for Bi-o” Theory

    There is still one question the theory cannot easily answer.

    Why would Seung-woon hurt Jeong-yo for Bi-o after already choosing Jeong-yo over Bi-o?

    That is the central contradiction.

    If he wanted his grandson to win at any cost, his earlier behavior makes very little sense.

    He could simply have favored Bi-o.

    Instead, he gave Jeong-yo recognition even though it wounded his grandson.

    For that reason, the simplest version of the theory—

    “Grandfather got rid of Jeong-yo so Bi-o could become No. 1”—

    currently feels too easy.

    The truth is likely more complicated.

    Seung-woon may have made a decision involving Jeong-yo.

    He may know something about his disappearance.

    He may even feel responsible for what eventually happened.

    But responsibility is not the same as deliberately destroying Jeong-yo for Bi-o’s benefit.

    That distinction could become crucial.

    Bi-o May Eventually Ask the Same Question

    Even if the theory turns out to be false, it could still matter enormously to Bi-o.

    Imagine discovering that your greatest rival disappeared after the adults around you interfered.

    Then imagine learning that the rival suffered an injury that ended his piano career.

    Bi-o may eventually wonder:

    Did Jeong-yo disappear because of me?

    That question could be far more destructive than losing a competition.

    Bi-o wanted to defeat Jeong-yo.

    But he wanted to defeat him at the piano.

    He wanted to prove that his years of discipline could overcome Jeong-yo’s natural genius.

    If Jeong-yo was removed from the competition by injury, manipulation or an adult decision, Bi-o never received the victory he actually wanted.

    He was simply left alone.

    And that could explain why Jeong-yo’s return as a conductor may shake Bi-o more deeply than another piano competition ever could.

    Jeong-yo’s Return Could Force the Truth Into the Open

    For years, the missing period in Jeong-yo’s life has allowed everyone to live with their own version of what happened.

    That becomes impossible once he returns.

    Jeong-yo is no longer merely a memory.

    He is standing in front of them again.

    And this time, he is holding a conductor’s baton instead of sitting at a piano.

    His presence alone could force the adults to confront the decisions they made.

    What did Seung-woon do?

    What did Seon-joo know?

    What happened to Jeong-yo’s right arm?

    Why did he disappear?

    And most importantly:

    Who benefited from his disappearance—and who tried to help him afterward?

    Those questions may eventually reveal that the rivalry between Bi-o and Jeong-yo was never only about two young pianists.

    The adults around them may have shaped the competition far more than either boy understood.

    Final Verdict: Did Seung-woon Remove Jeong-yo So Bi-o Could Win?

    At this point, there is not enough evidence to say yes.

    The theory is understandable.

    Jeong-yo threatened Bi-o’s position, disappeared, suffered a devastating injury and left the piano world.

    Bi-o remained.

    That sequence naturally creates suspicion.

    But Seung-woon’s earlier actions work against the simplest version of the theory.

    He had already demonstrated that he was willing to choose Jeong-yo over his own grandson.

    That makes it difficult to believe that his only motivation later would suddenly become making Bi-o No. 1.

    A more convincing possibility is that Seung-woon made a decision involving Jeong-yo that he believed was justified—but that decision had consequences he never intended.

    If so, the real mystery is not whether Seung-woon was secretly a villain.

    It is whether an adult who believed he was making the right decision helped create a tragedy.

    And that would fit Four Hands far better.

    Because the drama’s most interesting question has never simply been:

    Who is the better pianist?

    It is:

    What happens when adults turn two gifted young musicians into rivals—and realize the damage only after it is too late?

  • Did Yoon Seon-joo Help Jeong-yo Become a Conductor in Four Hands? The Chairwoman Theory Explained

    Jeong-yo’s return as a conductor in Four Hands creates an immediate question.

    How did a young pianist who disappeared after suffering a devastating right-arm injury eventually return to the classical music world as a conductor?

    His injury can explain why he stopped playing the piano.

    But it does not explain what happened next.

    Someone may have helped Jeong-yo rebuild his life.

    And one character now deserves much more attention:

    Yoon Seon-joo, the chairwoman and Kang Seung-woon’s wife.

    There is not yet enough evidence to say that Seon-joo definitely helped Jeong-yo become a conductor.

    However, several pieces of the story make the theory worth examining.

    Jeong-yo’s Injury Explains Only Half the Story

    We now have two very different versions of Jeong-yo.

    The first is the young piano genius.

    The second is the man who returns as a conductor.

    Between those two versions is a missing period that the drama has not fully explained.

    We know Jeong-yo disappeared.

    We also learn that his right arm was seriously injured, leaving him unable to continue playing the piano as before.

    But that creates another problem.

    A serious injury does not automatically turn a pianist into a conductor.

    Conducting requires education, training, opportunities, professional connections and, most importantly, someone willing to open the first door.

    So the real mystery may not simply be:

    Why did Jeong-yo stop playing piano?

    It may be:

    Who gave Jeong-yo a second chance in music?

    Why Yoon Seon-joo Is So Important

    Yoon Seon-joo should not be viewed only as Kang Seung-woon’s wife.

    She is also the chairwoman, which gives her a position of influence separate from her husband.

    That distinction matters.

    Kang Seung-woon represents musical authority.

    Seon-joo potentially represents institutional power—the ability to support someone, create opportunities and influence what happens behind the scenes.

    If Jeong-yo lost his future as a pianist but still possessed extraordinary musical ability, someone with both resources and an understanding of the classical music world would have been in a position to help him redirect that talent.

    Seon-joo fits that possibility.

    But again, this remains a theory until the drama explicitly confirms it.

    Her Departure From the House May Matter More Than It Seems

    Another detail makes the theory more interesting.

    Seon-joo leaves the household.

    At first, this can be understood primarily through her relationship with Kang Seung-woon and the conflict inside the family.

    But Four Hands repeatedly connects family decisions with musical consequences.

    That makes it reasonable to ask whether her departure also intersects with Jeong-yo’s missing years.

    What did Seon-joo know?

    Did she know where Jeong-yo had gone?

    Did she know about his injury?

    And if she discovered that a gifted young pianist could no longer use his right arm normally, did she simply watch his musical life end?

    Or did she decide to help him find another path?

    The drama has not answered those questions yet.

    But Jeong-yo’s return as a conductor makes them much harder to ignore.

    Why Would Seon-joo Help Jeong-yo?

    If the theory is correct, her motivation does not necessarily have to be mysterious or sinister.

    It could actually be very human.

    Jeong-yo was an exceptional young musician whose future suddenly collapsed.

    If Seon-joo believed that his musical gift remained intact despite his physical injury, she may have refused to accept that his career had to end with the piano.

    There is also a deeper possibility.

    The adults around Bi-o and Jeong-yo made choices that had enormous consequences for both boys.

    Kang Seung-woon chose Jeong-yo for an important musical opportunity rather than favoring his own grandson.

    Musically, that decision may have been fair.

    Emotionally, however, the rivalry between Jeong-yo and Bi-o became increasingly destructive.

    If Seon-joo witnessed the consequences, helping Jeong-yo later could have been partly motivated by responsibility.

    Not because she caused his injury—we have no confirmation of that—but because she may have felt that the adults could not simply abandon him after everything that happened.

    Did Kang Seung-woon Deliberately Remove Jeong-yo?

    This is where another viewer theory becomes much more controversial.

    Some viewers have speculated that Kang Seung-woon may have intentionally removed Jeong-yo from the competition or musical path in order to give Bi-o a better chance.

    It is an explosive theory.

    It is also not confirmed.

    In fact, there is an obvious contradiction.

    Earlier, Seung-woon appears willing to choose Jeong-yo over his own grandson when he believes Jeong-yo is musically superior or more appropriate for a particular opportunity.

    That does not naturally fit the behavior of a grandfather determined to guarantee Bi-o’s victory at any cost.

    If anything, Seung-woon’s earlier choices suggest that he values musical judgment enough to hurt Bi-o rather than simply favor him.

    So the theory that he suddenly decided to eliminate Jeong-yo solely to make Bi-o number one requires much stronger evidence.

    The drama may eventually provide that evidence.

    But it has not done so yet.

    Seung-woon and Seon-joo May Represent Two Different Responses

    There is another way to interpret the couple.

    Perhaps Seung-woon and Seon-joo respond differently to what happens to the two young musicians.

    Seung-woon is obsessed with music at the highest level.

    He recognizes talent, judges musicians harshly and appears willing to make painful decisions based on artistic standards.

    Seon-joo may represent a different perspective.

    She may be more concerned with what happens to the person after the musical judgment has been made.

    If Jeong-yo’s piano career was destroyed, Seung-woon might see a pianist who can no longer perform.

    Seon-joo might see a musician who still needs a future.

    If that contrast becomes part of the drama, it could explain why Jeong-yo eventually returns not as the pianist Seung-woon once recognized, but as a conductor who found another way to use his talent.

    Becoming a Conductor Would Require Years of Reconstruction

    This is another reason the missing years matter.

    Jeong-yo cannot simply disappear as a pianist and suddenly reappear as a convincing conductor without a major transformation.

    He would need to rebuild his understanding of music from a different perspective.

    As a pianist, his body directly produced the sound.

    As a conductor, he would have to communicate musical ideas through gesture, interpretation and leadership.

    He would also need access to orchestras, mentors and professional opportunities.

    That makes the identity of the person—or people—who supported him extremely important.

    If Seon-joo helped arrange that transition, her role in Four Hands could be much larger than viewers initially expected.

    She would not merely be the chairwoman or Seung-woon’s wife.

    She would become one of the key people responsible for Jeong-yo’s second musical life.

    The Right-Arm Injury Could Have Changed Seon-joo Too

    Jeong-yo’s injury obviously transforms Jeong-yo.

    But it may also transform the adults around him.

    Imagine the situation from Seon-joo’s perspective if the theory proves correct.

    A young man with extraordinary talent is suddenly unable to pursue the future everyone expected.

    The rivalry between him and her grandson has already caused emotional damage.

    Her husband has played a major role in shaping that rivalry through his musical choices.

    And now Jeong-yo has disappeared from the piano world entirely.

    Helping him become a conductor could therefore represent more than generosity.

    It could be Seon-joo’s attempt to repair something that the adults failed to protect.

    That would also give her departure from the household much greater dramatic meaning.

    And What Would This Mean for Bi-o?

    This is where the theory becomes especially powerful.

    Imagine Bi-o discovering that Jeong-yo has returned.

    For years, Bi-o measured himself against Jeong-yo.

    He wanted to defeat him at the piano.

    He wanted the recognition Jeong-yo seemed able to receive naturally.

    Then Jeong-yo disappeared.

    If Bi-o eventually learns that his own grandmother—or the woman at the center of his family—helped Jeong-yo rebuild his musical life, the emotional impact could be enormous.

    From Seon-joo’s perspective, she may simply have saved a gifted musician.

    From Bi-o’s perspective, it could feel like another member of his family chose Jeong-yo over him.

    That would reopen the deepest wound in their rivalry.

    And this time, the competition would no longer be pianist versus pianist.

    It could become something much more complicated:

    Bi-o at the piano, Jeong-yo on the conductor’s podium, and the same family standing between them.

    Could Jeong-yo’s Conducting Debut Be Connected to Seon-joo?

    This is now one of the details worth watching closely.

    When Jeong-yo appears as a conductor, viewers should pay attention not only to him but also to the people around him.

    Who arranged the opportunity?

    Who already knows him?

    Who is surprised to see him?

    And who is not surprised?

    A character’s reaction could reveal more than dialogue.

    If Seon-joo already knows about Jeong-yo’s conducting career before the rest of the family discovers it, that would strongly support the theory that she was involved during his missing years.

    If she is just as surprised as everyone else, the theory becomes much weaker.

    That is why her reaction to Jeong-yo’s return may become one of the most important clues.

    What We Know and What Is Still Theory

    At this stage, it is important not to mix confirmed story information with speculation.

    What the story establishes is that Jeong-yo’s path changes dramatically: the gifted pianist disappears, suffers a serious problem involving his right arm, and later returns to the musical world in a different role.

    What remains unresolved is exactly how that transformation happened.

    The idea that Yoon Seon-joo helped him become a conductor is therefore best understood as a viewer theory.

    Likewise, the idea that Kang Seung-woon deliberately pushed Jeong-yo aside to help Bi-o win should not yet be treated as established fact.

    Both theories may become important.

    Both could also be wrong.

    That uncertainty is precisely what makes the missing period in Jeong-yo’s life so interesting.

    Final Thoughts

    Jeong-yo’s right-arm injury explains why the piano disappeared from his life.

    It does not explain how music returned.

    That may be the next mystery Four Hands is preparing to answer.

    And Yoon Seon-joo is one of the strongest characters to watch.

    As chairwoman, she potentially has the resources and influence to help Jeong-yo.

    As Kang Seung-woon’s wife, she is close to the family conflict that shaped Bi-o and Jeong-yo.

    And as someone who leaves the household, she may have a story during Jeong-yo’s missing years that viewers have not yet seen.

    So the key question is no longer only:

    Who hurt Jeong-yo?

    There is another question that may prove just as important:

    Who saved Jeong-yo’s music after he could no longer play the piano?

    If the answer is Yoon Seon-joo, then her departure from the family may not have been the end of her role.

    It may have been the beginning of Jeong-yo’s second life.

  • Four Hands: Why Is Pi-o Falling Apart Because of Jeong-yo?

    At first, the rivalry between Kang Pi-o and Choi Jeong-yo in Four Hands, Two Sonatas looks familiar.

    Two gifted young pianists meet.

    One has spent his life training for perfection.

    The other possesses extraordinary natural talent.

    Competition begins.

    Jealousy follows.

    But after watching Pi-o more closely, I don’t think jealousy alone explains what is happening to him.

    In fact, the most painful part of their relationship may be the opposite.

    Pi-o knows that Jeong-yo is talented.

    He hears it.

    He sees it.

    And perhaps more importantly, he helps bring that talent out.

    That is what makes Jeong-yo so dangerous to him.

    Jeong-yo is not simply Pi-o’s rival.

    He is becoming the person who forces Pi-o to confront a question he has avoided for most of his life:

    Who am I if being the perfect pianist is no longer enough?

    Pi-o Has Spent His Life Being “The Talented Child”

    Pi-o did not suddenly become competitive after meeting Jeong-yo.

    Competition was already built into his life.

    From childhood, piano was connected to expectations, evaluations and results.

    His mother recognized his talent early and invested herself deeply in his success.

    His grandfather, Kang Seung-woon, is a legendary conductor whose approval carries enormous weight for Pi-o.

    So Pi-o learned something very early:

    Playing well is not enough.

    He has to prove himself.

    Again.

    And again.

    And again.

    Eventually, piano becomes inseparable from recognition.

    A competition result tells him whether he is succeeding.

    A teacher’s judgment tells him whether he is good enough.

    And his grandfather’s approval becomes something almost impossible to obtain.

    That is why one of Pi-o’s most revealing moments comes when he describes himself as having lived like a “competition machine.”

    That phrase explains much more than his career.

    It explains his identity.

    Then Jeong-yo Appears

    Jeong-yo comes from almost the opposite world.

    He does not have Pi-o’s carefully constructed path.

    His life has been unstable.

    His training has not followed the same elite route.

    Yet when he plays, something appears that cannot easily be taught.

    Instinct.

    Emotion.

    Musical intuition.

    Raw talent.

    And Pi-o notices it almost immediately.

    This is important.

    If Pi-o simply believed Jeong-yo was terrible, there would be no real psychological crisis.

    He could dismiss him.

    He could laugh at him.

    He could walk away.

    But Pi-o cannot do that.

    Because he knows.

    Jeong-yo is special.

    The Cruelest Part Is That Pi-o Helps Him

    This may be the most fascinating part of their relationship.

    Pi-o does not merely watch Jeong-yo improve.

    He helps him improve.

    He teaches him.

    He listens to him.

    He points things out.

    He gives Jeong-yo access to knowledge accumulated through years of Pi-o’s own training.

    And Jeong-yo absorbs it.

    That creates an almost unbearable contradiction.

    Pi-o wants his friend to succeed.

    But every step forward Jeong-yo takes also makes him more dangerous as a rival.

    Imagine spending your entire childhood building something brick by brick.

    Then someone arrives with an instinctive understanding of the thing you have spent years trying to master.

    Worse still, you like him.

    And you are helping him.

    That is not simple jealousy.

    That is emotional torture.

    Pi-o Doesn’t Hate Jeong-yo

    This is why I hesitate whenever Pi-o’s behavior is reduced to jealousy.

    There is jealousy, certainly.

    There is competitiveness.

    There is insecurity.

    But there is also affection.

    Pi-o and Jeong-yo genuinely connect through music.

    Pi-o sees something in Jeong-yo that the adults around them may not fully understand.

    And Jeong-yo, in turn, recognizes Pi-o’s importance.

    That makes the conflict much more painful.

    It is easy to compete against someone you hate.

    It is much harder to compete against someone you care about.

    Because every victory has a cost.

    If Jeong-yo fails, Pi-o loses someone important to him.

    If Jeong-yo succeeds, Pi-o feels himself disappearing.

    Grandpa Makes Pi-o’s Fear Real

    Then comes the moment that changes everything.

    Pi-o’s grandfather recognizes Jeong-yo.

    For Pi-o, this is devastating.

    Not simply because Jeong-yo receives an opportunity.

    It is because the person Pi-o most desperately wants recognition from sees something extraordinary in Jeong-yo.

    Suddenly Pi-o’s private fear becomes external reality.

    Until then, he could tell himself:

    Maybe I’m imagining it.

    Maybe Jeong-yo isn’t really better.

    Maybe my insecurity is irrational.

    But when Seung-woon chooses Jeong-yo, Pi-o can no longer hide from the comparison.

    His grandfather has made it real.

    “Who Will Be Left in Ruins?”

    One of Seung-woon’s most brutal observations concerns the relationship between the two young pianists.

    He essentially warns Pi-o to think about which of them will eventually be left emotionally devastated by their rivalry.

    It sounds cruel.

    And it is cruel.

    But it also reveals something Seung-woon has already recognized.

    Jeong-yo and Pi-o are not entering this relationship with the same psychological burden.

    Jeong-yo has many wounds of his own.

    But Pi-o has attached his self-worth to musical recognition.

    That makes every comparison dangerous.

    If Jeong-yo plays better, Pi-o doesn’t simply think:

    “He played better today.”

    Pi-o risks hearing something much more destructive:

    “Maybe I’m not who I thought I was.”

    That is why Pi-o is the one in danger of falling apart.

    Jeong-yo Threatens Pi-o’s Identity, Not Just His Career

    This distinction matters.

    If Jeong-yo were merely threatening Pi-o’s chance to win a competition, the problem would be relatively simple.

    Win the next competition.

    Practice harder.

    Try again.

    But Jeong-yo threatens something deeper.

    Pi-o has spent years constructing an identity around being exceptional.

    Then he meets someone whose talent challenges the meaning of everything he sacrificed.

    If Jeong-yo can reach people through music in a way Pi-o struggles to do, what were all those years of competitions for?

    If his grandfather sees something in Jeong-yo that he does not see in Pi-o, what does that say about Pi-o?

    And if Pi-o himself can hear what makes Jeong-yo special…

    where can he hide?

    He cannot even lie to himself.

    His Mother Makes the Pressure Worse

    Pi-o’s mother, Ji-hye, adds another layer.

    She has invested enormous emotional energy in her son’s success.

    That means Pi-o’s musical life is not entirely his own.

    His achievements carry his mother’s hopes.

    His failures threaten those hopes.

    And Jeong-yo becomes dangerous not only to Pi-o, but to the future Ji-hye has imagined for her son.

    This creates a painful trap.

    Pi-o is beginning to question whether he even wants the life that has been planned for him.

    But at exactly that moment, Jeong-yo appears and begins succeeding in the world Pi-o is considering leaving.

    So Pi-o cannot simply walk away.

    If he leaves, does that mean Jeong-yo won?

    If he stays, is he playing because he loves music?

    Or because he cannot bear to lose?

    That may be the real prison surrounding Pi-o.

    The Great Irony: Jeong-yo May Be Exactly What Pi-o Needs

    This is where I think Four Hands becomes much more interesting than a conventional rivalry drama.

    Jeong-yo may destroy the Pi-o we first meet.

    But perhaps that Pi-o needs to be destroyed.

    The “competition machine.”

    The grandson seeking approval.

    The son carrying his mother’s ambition.

    The technically excellent pianist who cannot explain why he is playing.

    Maybe that identity has to collapse before Pi-o can build another one.

    And strangely, Jeong-yo may be the person who makes that possible.

    Because for the first time, Pi-o is encountering music that cannot be reduced to rankings.

    He is encountering someone who forces him to listen differently.

    And through Jeong-yo, he may eventually be forced to ask:

    What does my own music sound like?

    Not his mother’s music.

    Not his grandfather’s standard.

    Not the judges’ scores.

    His.

    Maybe “Being Ruined” Isn’t the Ending

    That is why Seung-woon’s warning interests me so much.

    What if Pi-o really does end up emotionally shattered?

    The drama may initially make that sound like tragedy.

    But losing an identity is not always the same as losing yourself.

    Sometimes the identity that collapses was never truly yours.

    Pi-o may lose competitions.

    He may lose his grandfather’s approval.

    He may even temporarily lose confidence in his own talent.

    But if that destruction eventually allows him to play because he genuinely wants to play, then Jeong-yo will have done something no teacher, parent or competition could do.

    He will have forced Pi-o to become his own person.

    This Is Why Their Friendship Is More Interesting Than Their Rivalry

    The title Four Hands, Two Sonatas itself suggests that this story is not ultimately about one pianist eliminating the other.

    Four hands require two people.

    Two different players.

    Two different musical identities.

    That makes the emotional direction of the story fascinating.

    Perhaps the question is not:

    Who is better, Pi-o or Jeong-yo?

    Perhaps the real question is:

    Can Pi-o stop needing to be better than Jeong-yo?

    If he can, their rivalry may become something completely different.

    Jeong-yo could stop being proof of Pi-o’s inadequacy.

    He could become the musician who helps Pi-o discover what makes Pi-o unique.

    My Take

    I don’t think Pi-o is falling apart because he hates Jeong-yo.

    I think he is falling apart because he cannot dismiss him.

    He knows Jeong-yo is gifted.

    He cares about him.

    He helps him.

    And then he watches the person whose recognition he has wanted for years recognize Jeong-yo too.

    That combination attacks the very foundation of Pi-o’s identity.

    So when Pi-o becomes jealous, angry or irrational, I don’t see only a spoiled young pianist who cannot tolerate competition.

    I see someone realizing that the identity he spent his entire childhood building may not actually belong to him.

    And that is why Jeong-yo is simultaneously the most dangerous and perhaps the most important person Pi-o has ever met.

    Jeong-yo may be the person who breaks Pi-o.

    But he may also be the person who finally sets him free.

  • Why Does Pi-o’s Mother Hate Jeong-yo in Four Hands, Two Sonatas?

    Spoiler Warning: This article contains spoilers for Four Hands, Two Sonatas through Episode 4.

    Why does Pi-o’s mother seem to hate Choi Jeong-yo so much in Four Hands, Two Sonatas?

    At first, Kang Ji-hye’s reaction can look like the behavior of an overly competitive mother.

    Her son, Kang Pi-o, has been raised as an elite pianist. Then Jeong-yo suddenly appears, reveals extraordinary musical instinct and begins receiving attention from the people around Pi-o.

    But Ji-hye’s hostility toward Jeong-yo appears to be about more than protecting her son from a rival.

    Jeong-yo threatens the future Ji-hye has spent years building around Pi-o — and may also force her to confront her own unresolved relationship with her father, Kang Seung-woon.

    Why Is Pi-o’s Mother So Obsessed With His Success?

    Pi-o has grown up under enormous expectations.

    He is talented, disciplined and highly trained, but his musical life has also been shaped by competition and the need to succeed.

    Ji-hye is a major part of that environment.

    She does not simply want Pi-o to enjoy playing the piano.

    She wants him to win.

    That difference matters.

    For Pi-o, success gradually becomes connected to approval. Being talented is not enough. He has to prove that talent repeatedly.

    This helps explain why Jeong-yo’s arrival becomes so threatening.

    Why Does Jeong-yo Threaten Ji-hye?

    Jeong-yo enters Pi-o’s world from almost the opposite direction.

    He does not have Pi-o’s privileged musical upbringing or the same carefully planned career.

    Yet people quickly notice something unusual in his music.

    Jeong-yo possesses an instinctive musical ability that cannot easily be measured by competition results alone.

    And then Kang Seung-woon notices it too.

    That is where the conflict becomes much more personal.

    Jeong-yo is no longer simply Pi-o’s talented friend.

    He becomes someone capable of receiving the recognition Ji-hye desperately wants for her son.

    Grandpa Kang Seung-woon Is the Key

    To understand Ji-hye, we also need to look at her relationship with her father.

    Kang Seung-woon is not an ordinary grandfather.

    He is an enormously respected musician whose judgment carries tremendous weight inside the family.

    Pi-o wants his approval.

    But Ji-hye’s behavior suggests that she also cares deeply about what her father thinks of Pi-o.

    That means Pi-o’s success may represent more than a mother’s ambition for her child.

    His success can also become a way for Ji-hye to prove something to her own father.

    If Pi-o becomes the musician everyone expects him to become, Ji-hye’s choices are validated.

    But then Jeong-yo appears.

    And Seung-woon sees something special in him.

    Suddenly, the person disrupting Ji-hye’s carefully constructed future is not another elite student.

    It is Jeong-yo.

    Why Grandpa Choosing Jeong-yo Changes Everything

    Pi-o has trained for years.

    Ji-hye has invested enormous emotional energy in his success.

    Then Seung-woon becomes interested in Jeong-yo’s music and chooses to work with him.

    For Pi-o, this feels like rejection.

    For Ji-hye, it may feel like something even bigger.

    The person whose judgment matters most is recognizing another young pianist.

    And worse, Jeong-yo represents a kind of musical talent that cannot simply be defeated by making Pi-o practice harder.

    That may explain why Ji-hye sees Jeong-yo less as Pi-o’s friend and more as a danger.

    Does Pi-o’s Mother Really Hate Jeong-yo?

    “Hate” may actually be too simple a word.

    Ji-hye’s behavior can also be understood as fear.

    She fears what Jeong-yo’s talent could mean for Pi-o.

    She fears Pi-o losing his position.

    She may fear losing control over the future she has planned for him.

    And she may fear her father choosing Jeong-yo over Pi-o.

    This is why Jeong-yo’s presence becomes so disruptive.

    He does not have to attack Pi-o.

    Simply being talented is enough.

    Jeong-yo Is Not the Real Problem

    This is one of the most important distinctions in the drama.

    Jeong-yo did not create Pi-o’s pressure.

    That pressure existed long before he arrived.

    He did not create Pi-o’s need for his grandfather’s approval.

    He did not create Ji-hye’s expectations.

    And he did not create the complicated relationship between Ji-hye and Kang Seung-woon.

    Jeong-yo exposes problems that were already inside the family.

    That is why blaming him is so dangerous.

    If Ji-hye decides that removing Jeong-yo will solve Pi-o’s problems, she may completely misunderstand what is happening to her son.

    Pi-o’s Collapse Makes Ji-hye’s Role Even More Important

    Episode 4 ends with Pi-o unconscious in his room.

    The drama has not yet confirmed a specific medical explanation for his collapse.

    But the scene comes after Pi-o has been placed under extraordinary emotional pressure.

    And importantly, Ji-hye is the person who finds him.

    That creates a crucial question for what comes next.

    Will seeing Pi-o collapse make Ji-hye question the pressure she has placed on him?

    Or will she conclude that Jeong-yo is responsible?

    The answer could determine how much worse the conflict becomes.

    Because if Ji-hye chooses the second explanation, Jeong-yo may become the target for problems that began long before he entered Pi-o’s life.

    Is Ji-hye Repeating the Same Cycle?

    There may also be a larger theme developing here.

    Pi-o desperately wants recognition from his grandfather.

    At the same time, Ji-hye appears deeply affected by her own relationship with Kang Seung-woon.

    That creates the possibility of an emotional cycle passing from one generation to the next.

    A daughter struggles with her father’s expectations and judgment.

    Then she places enormous expectations on her own son.

    The son begins measuring his worth through the approval of the same grandfather.

    And eventually, Pi-o begins breaking under that weight.

    If this interpretation is correct, Jeong-yo is not the cause of the family conflict at all.

    He is the outsider who accidentally reveals it.

    Why Does Pi-o’s Mother Hate Jeong-yo?

    So why is Ji-hye so hostile toward Jeong-yo?

    It is probably not because Jeong-yo has personally done something terrible to her.

    Jeong-yo threatens the system of achievement, approval and control that Ji-hye has built around Pi-o.

    His natural musical instinct attracts Kang Seung-woon.

    His friendship changes Pi-o.

    And his presence forces Ji-hye to face the possibility that years of planning and pressure cannot guarantee the future she wants.

    That is what makes Jeong-yo dangerous to her.

    But Episode 4 leaves us with an even more important question.

    After finding her son unconscious, will Ji-hye finally realize that Pi-o needs something other than another victory?

    Or will her fear of Jeong-yo push Pi-o even further away from the music — and the friend — that once made him happy?

    More Four Hands, Two Sonatas Explained

    Read Why Did Pi-o Collapse in Episode 4? for our explanation of the shocking final scene.

    Read Why Is Pi-o Jealous of Jeong-yo? to understand why Grandpa’s recognition affects Pi-o so deeply.

    And see Pi-o vs Jeong-yo: Who Is the Better Pianist? for our analysis of training, instinct and the musical difference between the two characters.