Kana is a married woman who teaches at the same school as her husband. Kana's class is full of top students, but her husband Kenichi has a hard time dealing with Yano, the most problematic child in the class. Kana worries about Kenichi, but her fears are realized. One day after school, the two of them come across Yano and a student named Ichii arguing. Kenichi unilaterally decides that it is bullying and gives Yano some disciplinary action. However, Kana finds out that Ichii is the cause of the trouble. The next day, Yano, who is filled with anger and has nowhere to vent his anger, calls Kana in and orders her to atone for Kenichi's actions with her own body...