Spring Fever (Korean: 스프링 피버) is a 2026 South Korean television series starring Ahn Bo-hyun and Lee Joo-bin. Based on the web novel of the same name by Baek Min-a, it depicts the story of a woman who leaves Seoul after a heartbreak and meets a man who changes her life. It premiered on tvN on January 5, 2026, and aired every Monday and Tuesday at 20:50 (KST). It is also available for streaming on Amazon Prime Video globally.
Contents
Synopsis
Yoon Bom is a Seoul vibrant teacher who was accused of an affair scandal unfairly and she moved to Shinsu-eup, a rural area after her bad experience in Seoul. She starts teaching there and is cold and distant at first. But when she meets Seon Jae-gyu, a rough but kind hearted local man, she starts to warm up and opens her heart again.
Cast and characters
Main
Ahn Bo-hyun as Seon Jae-gyu
The CEO of JQ Power Energy. People who surround him see him as a big guy who might look like a rough street type, but he's actually got a heart of gold, is super considerate, and is just a genuinely nice guy.
Lee Joo-bin as Yoon Bom
Han Joo-hyun as young Bom
After a painful past in Seoul, she moves to Shinsu-eup and becomes a small-town teacher, catching the villagers' attention. She's tough outside, but soft inside.
Supporting
Cha Seo-won as Choi Yi-joon
An elite lawyer.
Cho Jun-young as Seon Han-gyeol
Jae-gyu's nephew.
Lee Jae-in as Choi Se-jin
Han-gyeol's rival.
Bae Jung-nam as Jeong Jin-hyeok
A PE teacher at Shinsu High School.
Jin Kyung as Seo Hye-sook
A first-year teacher at Shinsu High School, who handles homeroom duties and teaches Korean language. She's a mother of twins.
Son Yeo-eun as Seon Hee-yeon
Han-gyeol's mother
Production
Development
Spring Fever is directed by Park Won-gook, who previously helmed Marry My Husband (2024), written by Kim Ah-jung, planned by CJ ENM Studios, and produced by Bon Factory. The series is based on the web novel of the same name by Baek Min-a. It consists of 12 episodes.
Casting
In October 2024, Ahn Bo-hyun and Lee Joo-bin were reportedly cast, and principal photography was scheduled to begin in 2025.
In April 2025, Cha Seo-won was chosen to join. In May, Lee Jae-in is under positive review by her agency to appear. The casting of Ahn and Lee Joo-bin as the leads was officially confirmed in July. In September, Cha Seo-won, Cho Jun-young, Lee Jae-in, and Bae Jung-nam reportedly joined the cast.
Release
Spring Fever was originally scheduled to premiere on tvN in the second half of 2025 but later moved in the first half of 2026. The series was confirmed to premiere on January 5, 2026, airing every Monday and Tuesday at 20:50 (KST). It is also available for streaming on Amazon Prime Video in more than 240 territories.
