Ryoko Nagase, a new female teacher at a boys' school, accidentally discovers bullying. She tries to warn them off, but ends up being raped by the boys instead. They take pictures of her and try to keep her quiet... And before she knows it, the whole school is involved in the abuse of Ryoko. She is given the title of "sexual treatment unit advisor" and is raped raw by her male colleagues and even the students in her class!