STARS-839 Tomorrow, I'm going to use a vibrator in our homeroom class, so come and watch! A new athletic teacher, Saki Shinkai, gets raped by a male student during class.

Saki has been appointed as a new teacher. As a member of the athletic club, he confronts the students head-on and tries to give them passionate guidance, but as the days pass, he gradually becomes annoyed by the students. Every day, as a teacher, he tries to face his students even though he is subjected to insidious bullying... However, before he knows it, the positions of the students and the teacher are reversed... A school life that he cannot escape begins...