Misbehavior

A chemistry teacher at an all-boys high school struggles with an overwhelming workload and a lack of support from her partner at home. Tensions rise when a new colleague arrives who is the daughter of the school board chairman. While the administration favors the newcomer, the veteran teacher is forced to take on additional duties. The situation shifts when she discovers that her colleague is involved in a romantic relationship with one of the students.

Directed by Kim Tae-yong, this drama followed his 2014 project One Night Only and preceded his 2026 film Number One. Kim Tae-yong also wrote the screenplay. The movie stars Kim Ha-neul and Yoo In-young, with supporting roles played by Lee Won-keun, Lee Hee-jun, Ki Joo-bong, and Lee Ki-woo. The film was produced by Filament Pictures, filmK, and Filmmaker R&K.

Audience reception was mixed. On IMDb, the film holds a 5.8 rating based on 584 votes, while on TMDB it has a 5.4 rating from 29 votes.