Shoko is a strict teacher, but behind the scenes she is also a lewd woman who secretly enjoys an affair inside the school by having a physical relationship with her student Takagi. In the toilet. Shoko is completely captivated by the exciting sex she has with her student, who mutes her voice so other students won't hear. However, as the play escalates in search of more thrills, Tsukagoshi, a student in her class, finds out about her relationship with Takagi. She desperately begs Shoko not to tell anyone, but... Tsukagoshi smiled at her and said, ``If you don't want me to break up, do the same to me.''