While working as a female teacher, Maki harbors deep-seated sexual frustration. One day, after helping a bullied student named Shinomiya, she falls into a trap set by a gang of delinquents who end up assaulting her at her own home. Forced into humiliation, with compromising photos used to blackmail her, Maki is reduced to the role of a sex slave. During class, she is coerced into using sex toys and forced to sexually assault Shinomiya in front of other students. The boys' desires spiral out of control, driving them into an uncontrollable frenzy of abuse.