Yumeko, a frail student, is manipulated by the school nurse, Murakoshi-sensei, who convinces her that sexual acts are necessary medical treatments for her anemia. Murakoshi's predatory behavior soon extends to the student council president, Sayuri, and her friend Manami, using hypnosis to force them into erotic punishments. By distorting their reality and exploiting their vulnerabilities, Murakoshi begins a dark campaign of control over the school's girls.
Driven by an inferiority complex toward her twin sister Sayuri, Manami is manipulated by the predatory Murakoshi-Sensei into a cycle of sexual exploitation. Using hypnosis, the teacher seizes control of the school, turning classrooms and gym sessions into venues for debauchery. As the twins are forced into increasingly degrading acts, Manami’s will eventually shatters, leading to a twisted graduation ceremony where the teacher's absolute dominance is finalized.