Although Ayaka is a strict teacher, she secretly enjoys having an affair with her student. If this truth is discovered, her family will fall apart and she will no longer be a teacher. Ayaka has been carefully concealing her relationship with her student and hiding it. However, recently, the student has started to seek out a relationship with her even at school for thrills. Ayaka desperately tries to calm her student down and stop him from going out of control, but she cannot resist his intense caresses... Before long, Ayaka herself becomes addicted to the thrill and sense of immorality of sex at school.