Rising exclusive actress Mao Odagiri plays a new female teacher who, backed by her status as the daughter of the school's director, pushes aggressive reforms to turn the school into a top-tier academic institution. Strong-willed and uncompromising, she fiercely opposes anyone who resists her strict disciplinary methods—including corporal punishment and harsh student control—earning her resentment from those around her. Her pride and convictions become the target of students' rage when they catch her kissing her lover in a park. Their outrage erupts into chaos, especially as her former homeroom teacher is also revealed to have suffered her humiliation, sparking a massive conflict within the school. This intense confrontation and its unfolding drama form the core appeal of the film.