Second lead syndrome ; the sweet pain of falling for the one who won’t get the girl or guy. If you’re someone who cries over the second lead more than the main couple, you’re not alone. While some dramas get all the hype, we’re here to uncover lesser-known gems (2022–2025) that feature unforgettable second leads. Get ready to root for the underdog in these swoon-worthy stories.
1. Once Upon a Small Town (2022)
Episodes: 12
Where to Watch: Netflix
A peaceful countryside romance where the vet from the city becomes the town’s heartthrob but it’s the sweet, quiet police officer Ji-yul (Baek Seong-cheol) who gives major second lead syndrome. His quiet pining and heartfelt glances make you wish for an alternate ending.
2. The Midnight Studio (2024)
Episodes: 16
Plot: Seo Ki-joo runs a mysterious photo studio that only opens at midnight for ghosts. As he helps restless spirits move on, a fearless and kind-hearted lawyer named Han Bom gets involved. Though Ki-joo is the lead, the charming and loyal detective Seo Ki-won, who silently supports Bom, stole many hearts.
Why You’ll Feel It: Seo Ki-won’s quiet longing and unwavering support is the definition of second lead syndrome.
3. Our Blooming Youth (2023)
Episodes: 20
Where to Watch: Viki
In this historical romance, Han Sung-on (played by Yoon Jong-seok) is loyal, brave, and silently suffering everything a classic second lead should be. If you’re tired of arrogant leads, you’ll find comfort in his patience and nobility.
Also Read : Top 10 Romantic K‑Dramas Based on Webtoons (2019–2025)
4. Longing for You (2023)
Episodes: 14
Where to Watch: Viki.
Detective Oh Jin-seong is the lead, but the second male character (Go Young-joo) leaves a lasting impression with his quiet understanding and longing. The slow-burn heartbreak hits you hard by the end.
5. The Secret Romantic Guesthouse (2023)
Episodes: 18
Where to Watch: Viki
Three boys, one girl a historical setup for second lead heartbreak. Kim Si-yeol (Kang Hoon) plays the flirty yet deeply emotional second lead. His hidden sadness and unspoken love will absolutely wreck you.
6. My Lovely Boxer (2023)
Episodes: 12
Where to Watch: Viki
A rising athlete with a dark past, but it’s the second male character who becomes the emotional anchor. His patience and loyalty put him in the classic second lead hall of fame.
7. Oasis (2023)
Episodes: 16
Where to Watch: Viki, Kocowa
Set in the 1980s, this drama’s emotional turmoil is built on a love triangle. The second lead’s deep yearning and sacrifices make the heartbreak even more intense.
8. Summer Strike (2022)
Episodes: 12
Where to Watch: Netflix
While the main leads connect on a healing level, the second lead silently supports from the background. It’s that kind of unnoticed love that breaks you slowly.
9. Curtain Call (2022)
Episodes: 16
Where to Watch: Amazon Prime
Although the main story is grand and emotional, the second lead (Kang Ha-neul) offers emotional stability and wisdom. His calm, collected support hits harder than the dramatic confessions.
10. My Lovely Liar (2023)
Episodes: 16
Plot: Mok Sol-hee can hear lies. She meets Kim Do-ha, a murder suspect hiding a painful secret. But her childhood friend and rising idol, Jo Deuk-chan, remains by her side. Though not in the spotlight, his loyalty and hidden love made fans root for him.
Why You’ll Feel It: The way he smiles through pain while protecting Sol-hee quietly is classic SLS.
Final Thoughts
Second lead syndrome hits differently when the drama is underrated. These 10 lesser-known romantic K-dramas (2022–2025) offer emotional rollercoasters, subtle pain, and beautifully written characters who never got the love they deserved. If you’ve ever rooted for the “other guy,” this list is made for you.
