STARS-839 “Tomorrow, I’m going to stick a vibrator in our homeroom teacher’s class, so come watch www!” The new physical education teacher, Shinami Saki, gets gang-raped by male students during class.

Saki has been appointed as a new teacher. She is a sports person and confronts her students head-on, and she tries to give hot-blooded guidance, but as the days go by, her students gradually get annoyed. Every day she tries to face the students as a teacher while meeting the insidious bullying… But one day, the positions of the students and the teachers are reversed… The inescapable Ryo School life begins…