Yamasaki (Nagai), a teacher at a prestigious school, learns that her classmate Shimaoka (Kanome) is promoting prostitution for same-sex students. Yamasaki, who has a strong sense of justice, tries to stop her from recruiting her, but is reprimanded by her vice-principal because her parents have donated a large amount to the school. Even so, Yamasaki visits the Shimaoka family and approaches her mother Keiko (Aoi), but she is drugged and retaliated with lesbian play. Yamasaki resists trying to correct her parent and child, but she is restrained and raped with her lewd toy.
