Sachiko was a strict teacher, but behind the scenes she was a lewd woman who secretly enjoyed school affairs with her student Takagi. In the corner of the classroom. In the toilet. The sex with the student who killed the voice so that other students would not get caught was exciting, and Shoko was completely captivated. However, as the play escalated in search of more thrills, Tsukagoshi in the class sniffed out his relationship with Takagi. Sachiko desperately begs not to tell anyone ... Tsukagoshi smiled and said, "If you don't want to be dismembered, do the same for me."