A lot of K-drama fans love small-town romances because a quiet setting makes every heartbeat feel louder. This guide pulls together the Spring Fever Kdrama cast, the character connections, and the tone that makes the story feel like a warm blanket after a long day. The Spring Fever Plot leans into “spring drowsiness” as a metaphor_two people who feel emotionally numb begin to wake up again, one awkward smile at a time.
1. Spring Fever Drama Basic Information
The show airs on tvN and runs for 12 episodes. The Spring Fever Plot mixes rom-com energy with school-life humor, family secrets, and healing vibes that build gradually rather than exploding all at once.
| Category | Details |
|---|---|
| Title | Spring Fever |
| Network | tvN |
| Air Dates | Jan 5, 2026 – Feb 10, 2026 |
| Schedule | Mon & Tue, 8:50 PM (KST) |
| Total Episodes | 12 |
| Genres | Romantic Comedy, School, Family, Healing |
| Streaming (OTT) | TVING, DIGGLE (availability may vary by region) |
2. Spring Fever Kdrama cast: Main Cast
Below is the Spring Fever Kdrama cast you’ll see the most, with the emotional hooks that define each character.
(1) Seon Jae-gyu (played by Ahn Bo-hyun)
- A tough-looking uncle who lives only for his nephew_until feelings show up uninvited.
- Jae-gyu often gets mistaken for a gangster because of his build, but Jae-gyu’s real goal is simple: Jae-gyu wants to raise Seon Han-gyeol well.
- When Jae-gyu meets Yoon Bom, Jae-gyu feels heat in his chest for the first time in years.
- Jae-gyu flirts boldly, yet Jae-gyu carries a past that makes him question whether someone like him deserves anything called “spring.”
(2) Yoon Bom (played by Lee Joo-bin)
- A teacher who chooses isolation as self-protection_until a small town refuses to let her stay numb.
- Bom used to be outgoing and magnetic, but Bom changed after a painful incident.
- Bom moves from Seoul to Sinsu-eup and repeats a strict morning rule: “Don’t laugh. Don’t enjoy. Don’t be happy.”
- Jae-gyu’s constant flirting annoys Bom at first, but Bom gradually notices that Bom smiles more around him_almost against her will.
(3) Choi Yi-jun (played by Cha Seo-won)
- A flawless elite lawyer_and Jae-gyu’s former best friend, now driven by suspicion.
- Yi-jun has searched for Jae-gyu for over a decade.
- When Yi-jun finds Jae-gyu living quietly in Sinsu-eup and falling for Bom, Yi-jun feels anger instead of relief.
- Yi-jun decides Yi-jun will dig out the truth: why Jae-gyu disappeared, where the missing money went, and who the real culprit was.
- Yi-jun even toys with the idea of taking Bom_but Yi-jun can’t tell if Yi-jun’s obsession is revenge, jealousy, or something messier.
(4) Seon Han-gyeol (played by Jo Joon-young)
- The school’s #1 student and Jae-gyu’s entire world.
- Han-gyeol treats top grades like background noise and keeps trophies like clutter.
- Han-gyeol doesn’t pry into his parents’ death because Han-gyeol sees how much Jae-gyu sacrificed.
- Han-gyeol tries hard not to upset anyone_especially Choi Se-jin, the one classmate who openly resents him.
(5) Choi Se-jin (played by Lee Jae-in)
- The “forever #2,” fueled by pressure and pride.
- Se-jin is stuck in second place, and Se-jin’s father’s ambitions push her relentlessly.
- Se-jin gets even more irritated when Han-gyeol offers help, because Se-jin hears pity when Se-jin wants respect.
3.People Around Seon Jae-gyu
(1) Gu Philip (played by Bin Chan-wook)
- Philip handles Jae-gyu’s messes, paperwork, and random errands.
- Philip complains loudly, but Philip stays loyal because Philip secretly enjoys being needed.
(2) Seon Hee-yeon (played by Son Yeo-eun)
- Hee-yeon is Jae-gyu’s older sister and Han-gyeol’s biological mother.
- Hee-yeon vanished after leaving baby Han-gyeol behind, then returns years later for reasons that stay suspiciously unclear.
4. Yoon Bom’s Family
(1) Jeong Nan-hee (played by Na Young-hee)
- Bom’s mother and a legendary former actress.
- Nan-hee lives with constant public gossip, and Nan-hee struggles to balance celebrity life with being a mother who can’t always protect her daughter.
(2) Yoon Jeong-gi (played by Jo Seung-yeon)
- Bom’s father and a famous psychology professor. Jeong-gi carries guilt because Jeong-gi failed to fully stand by Bom during the incident that shattered her confidence.
(3)Bomsik (played by dog)
- Bomsik is a Chihuahua who acts like the household’s tiny mood-maker.
- Bomsik adds warmth whenever emotions get heavy.
5. People Around Choi Yi-jun
(1) Oh Seong-tae (played by Im Soo-hyung)
- Seong-tae works near Yi-jun and faces an unexpected life change that reshapes Seong-tae’s path.
(2) Choi Chang-woo (played by Seo Sang-won)
- Chang-woo is Yi-jun and Se-jin’s father and a provincial governor. Chang-woo treats academic success like proof of family worth.
(3) Lee Jin-hee (played by Kim Seon-hye)
- Jin-hee is Yi-jun and Se-jin’s mother.
- Jin-hee measures happiness in admissions letters and worries obsessively about anyone blocking Se-jin’s future.
6. People at Sinsu High School
(1) Seo Hye-sook (played by Jin Kyung)
- Hye-sook is a Korean-language teacher and Bom’s landlord.
- Hye-sook’s curiosity about Bom’s past turns into a running source of comedy and tenderness.
(2) Jeong Jin-hyeok (played by Bae Jung-nam)
- Jin-hyeok is the PE teacher and a former “small-town idol” type.
- Jin-hyeok feels his heart race around Hye-sook, especially during jiu-jitsu practice, but Jin-hyeok fears he can’t match her life experience.
(3) Hong Jeong-pyo (played by Oh Man-seok)
- Jeong-pyo calls himself Sinsu-eup’s card-shark and prefers a hwatu table (Korean traditional playing cards) to staff meetings.
- Jeong-pyo focuses on Se-jin because Jeong-pyo believes power follows her family.
(4) Wi Jeong-hwan (played by Jung Young-gi)
- Jeong-hwan acts like a walking mediator.
- Jeong-hwan shows up whenever tension rises, because Jeong-hwan knows this town runs on constant conflict resolution.
(5) Seok Gwan-su (played by Kim Byung-chun)
- Gwan-su is the principal who survives one parent complaint at a time.
- Gwan-su keeps his office door locked whenever trouble brews.
(6) Kim Dae-han (played by Ahn Sang-jin)
- Dae-han loves acting like the “older brother” even though Dae-han is a twin.
- Dae-han is more childish than he admits.
(7) Kim Min-guk (played by Choi In-woo)
- Min-guk hates calling Dae-han “older brother,” but Min-guk quietly adores him.
- Min-guk’s complaints never stop, yet Min-guk’s loyalty never wavers.
(8) Oh Dong-pyo (played by Lee Jae-moo)
- Dong-pyo treats Jae-gyu like a lifelong mentor after Jae-gyu saved him from bullies.
- Dong-pyo becomes one of the rare people who openly supports Jae-gyu.
7. Plot: A Romance That Wakes You Up from “Spring Drowsiness”)
- The Spring Fever Plot begins when Yoon Bom arrives in the seaside town of Sinsu-eup carrying a personal scar she won’t explain out loud.
- Bom becomes a homeroom teacher at Sinsu High and meets Seon Jae-gyu, the devoted uncle of her top student.
- The Spring Fever Plot works because contrast drives every scene: Bom looks cold but hurts deeply, while Jae-gyu looks scary but loves loudly.
- As Bom and Jae-gyu stumble into a sweet, intense romance, the town’s everyday kindness starts loosening the knots they’ve lived with for years.
- At the same time, school-life comedy and family tension keep piling up, while Yi-jun’s investigation drags Jae-gyu’s past back into the light.
- Because the drama is told in 12 episodes, the Spring Fever Plot stays tight: each episode pushes either the romance forward, the family secret deeper, or Bom’s healing one step further.
8. Original Work and Differences: Webtoon vs Drama)
The drama is adapted from the Naver Webtoon Spring Fever, and the Spring Fever Plot keeps its emotional core while changing several key character settings:
① In the webtoon, Seon Han-gyeol is an underachiever, but the drama turns Han-gyeol into the school’s #1 student.
② The webtoon includes Yoon Bom’s older brother, but the drama removes that character.
③ In the webtoon, Choi Yi-jun is a prosecutor, but the drama reimagines Yi-jun as a lawyer.
※ Looking for another K-drama to add to your watchlist? Our guide to The Judge Returns covers the full cast and a handy episode-by-episode overview – perfect before you start streaming.
9. Conclusion
If you want a comfort watch that still has mystery and bite, the Spring Fever Kdrama cast delivers strong chemistry across generations_from adults carrying regret to teens fighting pressure in the classroom. By the time the finale arrives, the Spring Fever Plot lands on a simple message: healing doesn’t always look dramatic; sometimes healing looks like choosing to laugh again, even when you promised yourself you wouldn’t.
※ Spring Fever (2026) — Cast, Synopsis & Details (MyDramaList)