Some endings in K-dramas are heartbreaking. And then there are K-drama endings that leave you asking yourself, “Wait… why didn’t she choose him?” Because there are instances in which the second lead is more than just a barrier to the main relationship.
Sometimes they are the ones who stayed. The one who listened. The one who supported the female lead without requiring anything in return. The one who loved the female lead and secretly wished for her to attain the happy ending. And that is usually when second lead syndrome starts.
We have all been there before. You start a K-drama and already know who the main couple is. You even vow to support the main couple. But then out of nowhere the second lead confesses, walks away, or even protects the main character. And at that moment, you may be even more sad than the main characters.
This list is dedicated to the second male leads who were adored more than the first male leads and to characters that undoubtedly deserved a better fate; here are the K-dramas where second lead deserved better.
Warning: This post contains spoilers and will touch on second leads and romance.
What Is Second Lead Syndrome in K-Dramas?
Second lead syndrome happens when viewers become emotionally attached to the character who is not supposed to get the main love interest.
Usually, the second lead is:
- The childhood friend who loved quietly for years
- The emotionally available green flag
- The charming best friend
- The person who always arrives when the main lead fails
- The one who understands the protagonist better than anyone else
- Or simply someone with chemistry so powerful that viewers start questioning the writers’ decisions
The worst part? You already know how the story will probably end. But you still hope. Until the final episode destroys you.
Some of the most memorable K-dramas have created legendary second leads whose heartbreak became just as important as the main romance. In some cases, fans still debate the ending years later.
Kdrama Second Lead Syndrome: Start-Up
Second Lead: Han Ji-pyeong
Played by: Kim Seon-ho
Han Ji-pyeong from Start-Up didn’t just suffer from unrequited love. He suffered from having the entire audience emotionally attached to him.
Ji-pyeong was intelligent, emotionally guarded, and sometimes frustrating, but underneath all that sharpness was a deeply lonely man who had spent much of his life protecting himself.
He had been there. He cared. He helped.
And even though circumstances made everything complicated, his feelings for Dal-mi were sincere. The problem was that Ji-pyeong always seemed to arrive at the wrong moment.
By the time he allowed himself to be emotionally vulnerable, Dal-mi’s heart was already moving in another direction. And that is exactly why his story hurts
Second Lead Syndrome: Reply 1988
Second Lead: Kim Jung-hwan
Played by: Ryu Jun-yeol
Few K-dramas have divided viewers quite like Reply 1988.
The debate between Team Taek and Team Jung-hwan became legendary, and even today, many fans still believe that Jung-hwan deserved a completely different ending.
Jung-hwan’s problem was never that he didn’t love Deok-sun enough. It was that he loved her too quietly. He noticed everything. Her expressions. Her habits. Her happiness.
He cared deeply but struggled to communicate what he felt. And while other people moved forward, Jung-hwan remained trapped inside his hesitation. That is what makes his story so painfully realistic.
Sometimes, loving someone isn’t enough if you never tell them. But knowing that doesn’t make his ending hurt any less.
Best Second Male Leads in Kdramas: True Beauty
Second Lead: Han Seo-jun
Played by: Hwang In-youp
If we’re talking about K-dramas where second lead deserved better, Han Seo-jun of True Beauty absolutely belongs near the top of the list.
Because honestly? The second lead syndrome was almost unavoidable. Seo-jun had everything that makes viewers fall in love with a K-drama character.
He was rebellious. He was protective. He was secretly soft-hearted. And underneath his intimidating appearance was someone carrying guilt and enormous love for the people around him.
His relationship with Lim Ju-kyung was one of the reasons so many viewers became Team Seo-jun. Their chemistry felt natural, and his feelings for her were impossible to ignore.
And honestly, the amount of emotional damage this fictional man caused K-drama viewers should be studied.
Extraordinary You
Second Lead: Lee Do-hwa
Played by: Jung Gun-joo
If you have read my review of Extraordinary You, then you already know why this fantasy romance stands out.
But beyond Dan-oh and Ha-ru’s beautiful love story, Lee Do-hwa quietly became one of those characters you desperately wanted to see happy.
Do-hwa spends much of the drama trapped inside the expectations of the world around him. He is charming, expressive, and emotionally aware, but his relationships are complicated by the story’s unusual fantasy premise.
What makes him such a lovable second lead isn’t simply romance. Unlike some second leads who exist only to create jealousy, Do-hwa feels like a genuinely important character.
Because Do-hwa deserved a love story where he wasn’t simply standing on the sidelines. He deserved to be someone’s first choice.
Kdrama Second Lead Syndrome: She Was Pretty
Second Lead: Kim Shin-hyuk
Played by: Choi Si-won
Kim Shin-hyuk is the kind of second lead who makes you question the entire romantic setup. Because while the main romance develops through history and destiny, Shin-hyuk falls for Hye-jin because of who she is right now.
Her personality. Her kindness. Her awkwardness. Her imperfections. And that is exactly why his feelings became so meaningful.
Shin-hyuk constantly encourages Hye-jin and supports her confidence. His affection isn’t based on her appearance or her past. He genuinely appreciates the woman standing in front of him. That makes his unrequited love incredibly difficult to watch.
And unlike many K-drama characters, he doesn’t spend the entire series pretending otherwise. But unfortunately, sincerity doesn’t always guarantee a happy ending.
Who Are You: School 2015
Second Lead: Gong Tae-kwang
Played by: Yook Sung-jae
Some second leads make you sad. Others make you completely emotionally attached to them. Gong Tae-kwang did both.
Tae-kwang was chaotic, unpredictable, funny, and often misunderstood. But beneath his rebellious personality was a deeply lonely teenager desperate for genuine connection.
His relationship with Lee Eun-bi became one of the emotional highlights of Who Are You: School 2015.
He supported her. Protected her. Made her laugh.
And slowly developed feelings that viewers could see long before he was able to properly express them.
Strong Woman Do Bong-soon
Second Lead: In Guk-doo
Played by: Ji Soo
Now, let’s be honest. Ahn Min-hyuk was always incredibly difficult to compete with. But that doesn’t mean In Guk-doo didn’t deserve better.
Guk-doo’s situation was complicated because Bong-soon had loved him for years before she realised her feelings for Min-hyuk.
He wasn’t necessarily the perfect second lead. He could be frustrating and emotionally slow.
But there was something sad about watching him realise what he had lost only after Bong-soon’s feelings had changed. Sometimes, that’s how life works. You don’t understand someone’s importance until they stop waiting for you.
And Guk-doo’s storyline captures that painful reality. He eventually understands Bong-soon in ways he didn’t before, but by then, her heart belongs somewhere else.
Second Lead Syndrome: The Heirs
Second Lead: Choi Young-do
Played by: Kim Woo-bin
Choi Young-do is not your traditional green-flag second lead. In fact, at the beginning of The Heirs, he is often the opposite.
He’s arrogant. Aggressive. Emotionally immature. And incredibly difficult.
So why did so many viewers still develop second lead syndrome? Because the drama slowly revealed the broken person behind the behaviour.
Young-do’s story became one of growth. He began understanding his feelings, his loneliness, and the consequences of the way he treated other people.
His complicated relationship with Cha Eun-sang became central to his emotional development. And while his actions weren’t always romantic or acceptable, his vulnerability made him fascinating.
Sometimes, saying a second lead “deserved better” doesn’t mean they deserved the female lead. It means they deserved healing. And Young-do desperately needed that.
Second Lead Syndrome Kdrama: Reply 1994
Second Lead: Chilbong
Played by: Yoo Yeon-seok
Chilbong is one of those second leads who hurts because he is so genuinely easy to love. He is charming, caring, and emotionally sincere. And perhaps most importantly?
He makes his feelings clear. His love story doesn’t depend on manipulation or emotional games. He genuinely cares about Na-jung and wants to be part of her life.
But K-dramas have taught us something cruel over the years:
Being a good person doesn’t guarantee that you’ll be chosen.
And Chilbong’s story captures that perfectly. Sometimes, the person you love simply loves someone else.
He was the kind of person many fans wanted to protect by the end.
Best Second Male Leads in Kdramas: Mr. Sunshine
Second Lead: Goo Dong-mae
Played by: Yoo Yeon-seok
Some second leads deserve better because they should have gotten the girl. Some deserve better because life itself was cruel to them.
Goo Dong-mae is one of those characters.
His story in Mr. Sunshine is darker, more complicated, and far more tragic than the traditional second lead storyline. He is not a perfect romantic hero.
And yet, his devotion to Go Ae-shin reveals a different side of him. The tragedy of Dong-mae is that love doesn’t erase the life he lived before it.
You don’t necessarily watch Mr. Sunshine hoping that Ae-shin will choose him. Instead, you watch his story wishing that somewhere, somehow, he could have had a different life.
My Lovely Liar
Second Lead: Lee Kang-min
Played by: Seo Hyun-chul
Kang-min’s situation in My Lovely Liar is painful because relationships don’t always end simply because people stop caring. Sometimes they end because trust has been damaged beyond repair.
His connection with Mok Sol-hee carries emotional history, regret, and unresolved feelings. And while the main romance between Sol-hee and Do-ha becomes the emotional centre of the drama, Kang-min represents something different:
the painful consequences of a relationship that couldn’t survive its past.
He doesn’t necessarily deserve to be reunited with Sol-hee. But he deserves to move forward. That is something K-dramas often forget about second leads.
Second Lead: Ji Seong-hyun
Played by: Lee Sang-yi
Ji Seong-hyun may not have caused the most extreme case of second lead syndrome, but he absolutely deserves recognition for being one of the healthiest second leads in K-drama romance.
Unlike characters who manipulate, interfere, or create unnecessary drama, Seong-hyun genuinely respects Hye-jin’s feelings.
He cares about her. He has feelings for her. But he also understands that love cannot be forced. And that maturity makes his story surprisingly emotional.
The worst part about being a good second lead is that sometimes you’re so respectful that you quietly step aside while everyone else gets their happy ending.
Which K-Drama Has the Worst Case of Second Lead Syndrome?
If you’re looking for the most intense second lead syndrome, these are the dramas most likely to emotionally destroy you:
Best for intense second lead syndrome:
- Start-Up
- True Beauty
- Reply 1988
- She Was Pretty
- Who Are You: School 2015
Best for emotionally complicated second leads:
- Mr. Sunshine
- The Heirs
- Reply 1994
- Extraordinary You
Best for respectful and lovable second leads:
- Hometown Cha-Cha-Cha
- Strong Woman Do Bong-soon
Conclusion
That is the reality of second lead syndrome. Sometimes, the second lead is better. Sometimes, the second lead communicates better. Sometimes, they deserve to be in the main couple because they are better than the main character in that K-drama.
And still…
They don’t. But perhaps that’s why. Because of this, we have got a second chance at staying by their side.
These characters keep us hoping that maybe, just once, things will go the way of true love. That maybe good timing and messy feelings won’t get in the way of us being the person they deserve.
Sometimes it’s the person who deserves to go off into the sunset, who is left to walk alone.
Tell us who your K-drama second lead is in the comments down below. And if you love discovering addictive K-dramas, unexplainable romances, emotional reviews and more that will take over your watchlist, make sure to check out our website BooksandDramas!
Image Credits & Disclaimer:
K-drama posters and stills used in this post are sourced from official platforms (e.g., tvN, SBS, Netflix, Viki) and are used under fair use for review and commentary. All rights belong to their respective owners. If you wish to request credit changes or removal, please contact us.
