Second Lead Syndrome: Best K-Webtoon Second Male Leads

Second male leads in K-Webtoons have captured the hearts of readers with their unwavering devotion, kind-hearted nature, and often heart-wrenching fate. Unlike the main male lead, who usually wins the protagonist’s heart, the second male lead is the one who silently supports, protects, and loves from the sidelines—often leading to the infamous “Second Lead Syndrome.” These characters are typically charming, emotionally mature, and deeply loyal, making readers root for them even when they’re destined for heartbreak. Whether they’re the childhood friend, the knight in shining armor, or the misunderstood noble, second male leads add emotional depth and tension to romance webtoons, leaving a lasting impact long after the story ends.

Despite their often bittersweet fates, second male leads play a crucial role in webtoons. They add depth, conflict, and emotional tension, making romance plots more compelling. And in rare, glorious cases, they actually do get the girl, giving fans a moment of triumph in a genre where their heartbreak is almost inevitable. Love them or grieve for them, second male leads are an unforgettable part of the webtoon experience. Below are 4 second male leads to swoon for! 

Note: This is not a ranking. 

1. Han SeoJun from “True Beauty”

Han SeoJun from “True Beauty” (by Yaongyi) is the ultimate second male lead who stole the hearts of fans with his bad-boy charm, hidden tenderness, and unwavering loyalty. SeoJun initially comes off as tough and aloof, but beneath his sharp exterior lies a deeply caring and selfless soul. His love for JuGyeong is both heartwarming and heartbreaking—he supports her, protects her, and loves her without expecting anything in return, making him the epitome of Second Lead Syndrome. Despite his playful teasing and confident demeanor, SeoJun carries his own emotional wounds, adding layers to his character that make him impossible to forget. Whether he’s riding his motorcycle, flashing his signature smirk, or silently enduring unrequited love, Han SeoJun is proof that sometimes, the second lead deserves the world—even if he doesn’t always get it.

Read “True Beauty” here. 

“True Beauty” by Yaongyi on Naver Webtoon

2. Baek Kyung from “July Found By Chance” (“Extraordinary You”) 

Baek Kyung from “July Found By Chance” (by Moo RyuYee) is the classic tsundere second male lead—cold, arrogant, and emotionally distant at first, yet hiding a deeply vulnerable and conflicted heart. As DanOh’s assigned fiancé in the predetermined world of a manhwa, he initially treats her with indifference, unaware of his true feelings. However, as DanOh gains self-awareness and begins to break free from the story’s constraints, Baek Kyung finds himself struggling between fate and free will, revealing glimpses of his genuine love and regret. Despite his harsh exterior, Baek Kyung’s backstory and character development make him a tragic yet compelling figure, leaving fans torn between frustration and sympathy. His journey from a reluctant, emotionally closed-off character to someone who desperately wishes for a second chance with DanOh is what makes him such an unforgettable second male lead. Love him, hate him, or pity him—Baek Kyung is proof that sometimes, even a villain in the story can have a heart that aches.

“July Found By Chance” by Moo RyuYee on Daum Webtoon

3. Ha MinWoo from “Surviving Romance”

Ha MinWoo from “Surviving Romance” (by Lee Yeon) is far from your typical second male lead—he’s a fierce survivor, a dependable fighter, and an unwavering pillar of support in a world turned upside down. As chaos erupts in what was supposed to be a cliché romance story, MinWoo quickly proves himself to be resourceful, brave, and deeply loyal to ChaeRin, standing by her side as they navigate a nightmarish reality. Unlike many second leads who suffer from unrequited love in the shadows, MinWoo’s presence is active and vital—his sharp instincts, strong moral compass, and quiet yet steadfast care for ChaeRin make him irreplaceable in the fight for survival. Though the webtoon blends romance with horror, his character shines as both a protector and a deeply human figure who wrestles with fear, sacrifice, and hope. Whether he’s strategizing against the infected, risking his life for the group, or showing rare moments of warmth amid the terror, Ha MinWoo is the kind of second lead who makes you wish the story would rewrite itself—just for him.

Read “Surviving Romance” here. 

“Surviving Romance” by Lee Yeon on Naver Webtoon

4. Baek InHo from “Cheese In The Trap”

Baek InHo from “Cheese in the Trap” (by Soonkki) is the charismatic, hot-tempered, yet deeply wounded second male lead who effortlessly steals the hearts of readers. With his rough-around-the-edges personality and rebellious streak, he initially comes off as a troublemaker, but beneath his brash exterior lies a kind-hearted, fiercely loyal, and emotionally vulnerable soul. Once a prodigious pianist, InHo’s life took a tragic turn, leaving him struggling to find his place in the world. Despite his hardships, he remains protective and caring, especially toward Hong Seol, whom he grows to admire and cherish in ways he never expected. His playful banter, unfiltered honesty, and quiet acts of selflessness make him an unforgettable second lead, even as he battles his own regrets and unspoken emotions. Though fate may not be on his side in love, Baek InHo’s raw emotions, growth, and undeniable charm make him a character that lingers in the hearts of fans long after the story ends. Because sometimes, the second lead isn’t just a runner-up—he’s a story all on his own.

Read “Cheese In The Trap” here. 

“Cheese In The Trap” by Soonkki on Naver Webtoon

In the world of romance webtoons, Second Lead Syndrome is a bittersweet reality—a narrative twist where the heart often aches for the one who loves quietly from the sidelines. Which of these second male leads gave you second lead syndrome? Let us know down in the comments below!