Misbehavior

Misbehavior (, lit. "Female Teacher") is a 2016 South Korean psychological thriller film written and directed by Kim Tae-yong. The film stars Kim Ha-neul, Yoo In-young and Lee Won-keun. Plot A love triangle among two female teachers and a male student. Park Hyo-joo is a part time chemistry teacher at a high school. After her colleague goes on a maternity leave, she takes over as the homeroom teacher. However, she becomes envious of the newcomer Cha Hae-young, who became a tenured teacher through her rich connections. At home, she has to struggle with her deadbeat boyfriend who gaslights her. Eventually, she breaks up with him. One night, Park Hyo-joo discovers Cha Hae-young having sex with a student named Shin Jae-ha. The next morning, she threatens to expose Cha Hae-young unless she breaks up with Shin Jae-ha. In the following days, Park Hyo-joo enrolls Shin Jae-ha in ballet classes, to support him for an upcoming competition. During that time, she seduces the student to cope with loneliness.