Part 2 — Did Kim Ji-won and Jin Goo Steal Descendants of the Sun? (You are here)
When Descendants of the Sun premiered in 2016, its leading couple attracted enormous attention.
Yoo Si-jin, played by Song Joong-ki, was a charming special forces officer with a talent for turning even dangerous situations into moments of romance.
Kang Mo-yeon, played by Song Hye-kyo, was an intelligent doctor who challenged him at every opportunity.
Their chemistry helped define the drama.
But there was another love story unfolding alongside theirs.
One filled with separation, frustration, stubbornness, and an almost unbearable longing.
It belonged to Yoon Myung-joo and Seo Dae-young, played by Kim Ji-won and Jin Goo.
Ten years later, their relationship still inspires viewers to revisit the drama.
And I understand why.
The Second Couple Had a Problem the Main Couple Didn’t
The two romances in Descendants of the Sun begin from very different places.
Yoo Si-jin and Kang Mo-yeon must discover whether their attraction can survive the conflict between their professions.
He is a soldier whose duty sometimes requires him to use force.
She is a doctor whose responsibility is to save lives.
Their differences create tension, but their romance also has plenty of humor, flirting, and playful exchanges.
Myung-joo and Dae-young face another kind of obstacle.
They already know they love each other.
Their problem isn’t falling in love. It’s being allowed to stay in love.
Myung-joo is an army doctor, a commissioned officer, and the daughter of a powerful military commander.
Dae-young is a noncommissioned officer whose relationship with her threatens to place him in conflict with the military hierarchy.
Her father disapproves of their relationship.
And Dae-young, despite his feelings, repeatedly tries to walk away.
For Myung-joo, his withdrawal feels like rejection.
For Dae-young, staying with her risks creating a future in which his love and career are constantly judged through her father’s authority.
That makes their relationship more complicated than a conventional romantic misunderstanding.
Yoon Myung-joo Refused to Let Her Father Choose Her Future
One reason I became a Kim Ji-won fan was the way she portrayed Yoon Myung-joo.
Myung-joo is beautiful, but that isn’t what makes her unforgettable.
She is direct, confident, sometimes impatient, and completely unwilling to pretend she doesn’t know what she wants.
As a commander’s daughter, she could have followed a comfortable and predictable path.
Instead, she chooses a man her father doesn’t approve of.
And she refuses to hide her feelings simply to make other people comfortable.
Her stubbornness occasionally causes problems. She can push Dae-young when he is already struggling with a difficult decision.
But I admire the fact that she doesn’t quietly surrender her future.
She has rank, privilege, and family expectations. Yet she insists that her heart belongs to her.
That determination gives the relationship much of its emotional power.
Seo Dae-young Wasn’t Simply a Man Running Away From Love
At first, Dae-young can be frustrating.
He loves Myung-joo, yet he keeps his distance.
He often seems more willing to suffer silently than explain what he feels.
From Myung-joo’s perspective, that can look like cowardice.
But the drama gradually reveals a more complicated conflict.
Dae-young wants to remain a soldier.
He takes pride in his service, his responsibilities, and the identity he has built for himself.
He also wants to love Myung-joo without becoming someone who depends on her father’s approval for his future.
That is why his decisions are so painful.
If he walks away, he loses the woman he loves.
If he stays under conditions he cannot accept, he fears losing something essential about himself.
Myung-joo wants him to choose their love. Dae-young wants to make that choice without losing his dignity.
Neither desire is unreasonable.
And that is what makes their relationship compelling.
The Moment Their Love Became More Than a Romance
One of the most revealing developments comes in the later episodes.
Dae-young considers leaving the military so he can build a future with Myung-joo.
But Myung-joo is not simply delighted by the sacrifice.
She knows how much his career means to him.
She understands that he has worked hard to become the soldier he is.
The possibility that he might abandon that identity because of her is not the romantic victory she wants.
This is where their relationship becomes especially interesting.
Myung-joo doesn’t merely want Dae-young beside her.
She wants the man she fell in love with to remain himself.
And Dae-young doesn’t want to be accepted as an exception granted to the commander’s daughter.
He wants to earn respect on his own terms.
Their struggle is no longer just about whether two people can date.
It is about whether they can create a future in which both people are respected.
Why Their Separation Was So Painful
The final episodes push both couples into devastating uncertainty.
Yoo Si-jin and Seo Dae-young disappear duringhave died.
Kang Mo-yeon and Yoon Myung-joo must confront the possibility that the men they love will never return.
But Myung-joo’s grief carries an additional burden.
She and Dae-young have spent so much time arguing, separating, and struggling to find a way forward.
When she receives the news of his apparent death, she is devastated by the thought that they never had the chance to resolve everything between them.
The KBS Drama Classic finale recap captures this emotional conflict.
Myung-joo’s grief is not only about losing Dae-young.
It is also about all the things they still needed to say.
That is a particularly painful kind of romantic tragedy.
When someone disappears before a relationship has found peace, even an ordinary argument can become an unbearable memory.
For viewers who followed the couple from the beginning, those scenes make their eventual reunion especially moving.
Their Happy Ending Was About Respect, Not Just Romance
The finale gives Dae-young an important decision.
After surviving the operation and returning to Myung-joo, he decides not to abandon his military career.
He wants to continue serving and find another way to earn her father’s recognition.
That choice changes the meaning of their relationship.
He is no longer trying to escape the problem by leaving the army.
And Myung-joo is no longer being asked to accept a future in which the man she loves has sacrificed his professional identity.
When her father finally acknowledges Dae-young, the reconciliation feels significant.
It isn’t simply permission for two people to be together.
It is recognition of the person Dae-young has worked to become.
Myung-joo fought for the freedom to choose whom she loved. Dae-young fought for the right to remain himself while loving her.
Their ending allows both things to exist together.
That is why I find their story so satisfying.
What Viewers Are Still Saying About the Gu-Won Couple
The relationship between Myung-joo and Dae-young is often called the Gu-Won couple by Korean fans, a nickname formed from the actors’ names, Jin Goo and Kim Ji-won.
And the couple continues to attract attention long after the drama’s original broadcast.
In July 2025, a YouTube review revisited Descendants of the Sun specifically from the Gu-Won couple’s perspective.
The premise was simple but revealing: even people who had watched the drama many times might discover something new by following the second couple’s story.
Among the comments, one viewer expressed a preference for the Gu-Won couple over the main romance.
Others praised Kim Ji-won’s emotional performance and the painful intensity of the relationship.
In another KBS Drama Classic discussion, a viewer described Seo Dae-young and Yoon Myung-joo’s romance as a particularly heartbreaking love story.
These are individual viewer reactions, not evidence that the secondary couple was universally more popular.
But they demonstrate something worth noticing.
A decade later, people are still discussing the emotions, choices, and sacrifices that made this relationship memorable.
That kind of response says a great deal about the staying power of these characters.
Did They Really Steal the Show?
I don’t think Descendants of the Sun needs a winner between its two couples.
The main romance and the secondary romance work because they offer different emotional experiences.
Yoo Si-jin and Kang Mo-yeon give the drama much of its humor and romantic excitement.
Their conversations are playful, their chemistry is engaging, and their love story is central to the series.
Myung-joo and Dae-young provide a different kind of intensity.
Their relationship is quieter in some moments, more painful in others, and deeply connected to questions of pride, duty, and personal choice.
One couple makes you smile.
The other can leave you holding your breath.
Together, they make the drama richer than either romance would be alone.
Personally, I was drawn most strongly to Myung-joo.
Her confidence, honesty, and determination made me a Kim Ji-won fan.
And Dae-young’s struggle to protect both his love and his identity made their relationship more meaningful to me.
So did Kim Ji-won and Jin Goo steal Descendants of the Sun?
For some viewers, their romance may be the one that stays in the heart the longest.
For me, it certainly remains one of the drama’s most unforgettable stories.
Ten Years Later, Their Love Story Still Feels Personal
Many Korean dramas have memorable second couples.
But Myung-joo and Dae-young stand out because their biggest conflict cannot be solved by a single confession.
They love each other.
They know it.
And still, they must confront family expectations, military hierarchy, personal pride, and the fear of losing one another.
Their relationship reminds us that love is not always about choosing between two people.
Sometimes it is about choosing how to live without betraying yourself.
That is the question Descendants of the Sun asked through Yoon Myung-joo and Seo Dae-young.
And ten years later, it remains worth remembering.
Continue the Descendants of the Sun: 10 Years Later Series
Part 1 — Why I Became a Kim Ji-won Fan Instead of Song Hye-kyo
A personal reflection on the fearless character who made me a Kim Ji-won fan.
Part 2 — Did Kim Ji-won and Jin Goo Steal Descendants of the Sun? (You are here)
Part 3 — Why Descendants of the Sun’s OST Still Hits Different 10 Years Later
How Gummy’s “You Are My Everything” and other songs became part of the drama’s emotional legacy.
Part 4 — Why I Still Watch Descendants of the Sun When I’m Feeling Down
Why the humor, romance, and uplifting energy of this 2016 drama keep bringing me back.
The romance between Yoon Myung-joo and Seo Dae-young is one reason Descendants of the Sun remains memorable long after its original broadcast. But the drama’s lasting appeal goes beyond a single couple, combining humor, romance, music, and characters viewers want to revisit. Read why I still rewatch Descendants of the Sun whenever I’m feeling down for a personal look at why this drama continues to offer comfort ten years later.