Aimi, a Japanese language teacher who has just finished her maternity leave, is dissatisfied with her students' poor performance. She openly looks down on her students, and the students grow dissatisfied with her, until Ishikawa, a delinquent student, rapes Aimi in the classroom late at night. However, even though Aimi was being sexually assaulted, her body had become more sensitive due to postpartum changes, and she felt it more than usual.