이 Joo-bin is disarmed in front of Ahn Bo-hyun.

The new tvN Monday-Tuesday drama Spring Fever, directed by Park Won-guk, written by Kim A-jung, planned by CJ ENM STUDIOS and produced by Bon Factory, scheduled to premiere on Monday, Jan. 5, 2026, is a hot pink romance of spring days that will melt the frozen hearts of teacher Yoon Bom (played by Lee Joo-bin), who feels the chilly wind blowing, and the man with a burning heart, Seon Jae-gyu (played by Ahn Bo-hyun).

The third teaser video released today (the 18th) opens with teacher Yoon Bom, who volunteers to be the town's outsider, saying, "Shall I start another gloomy day today?" After a certain incident, Yoon Bom, who decided to live blandly, places a spell on herself, "Do not smile, do not be happy, do not be glad," and maintains a fortress mode. It raises curiosity about why Bom is trying so faithfully to keep this vow.

But Bom's resolve begins to waver with the arrival of Jae-gyu, who has an overwhelming presence. Bom gets involved with the town's person of interest, Seon Jae-gyu, and finds herself laughing, cheering and fluttering. Bom's change, as her self-imposed vows collapse while she falls helplessly for Jae-gyu, brings laughter and promises a pleasant romance.

People's curiosity grows about what will unfold between Jae-gyu and Bom, who burst into each other's lives. As the two exchange heart-fluttering glances that raise viewers' heart rates, the premiere of Spring Fever is even more anticipated to see how Bom's long-running spring lethargy will change after meeting Jae-gyu.

The appearance of Ahn Bo-hyun and Lee Joo-bin, who are reliable and rising actors, as well as director Park Won-guk, who directed Marry My Husband, which recorded the highest ratings in tvN Monday-Tuesday drama history, helm the new tvN Monday-Tuesday drama Spring Fever, which will premiere on Monday, Jan. 5, 2026, at 8:50 p.m.

[Photo] tvN

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