Bougyaku Gakuen

Miyuki Hara is a beautiful 29-year-old music teacher. She comes to a small town to teach at Sobu High School.

Miyuki attracts the attention of a gang leader. His name is Taka. He and other gang members start to disrupt her class.

She consults with her colleague, Keiko. Keiko invites her to a party that Taka will attend. Miyuki decides to go to create a good relationship with him. When she gets there, she finds out Keiko is actually Taka's mistress. Keiko invites her to become Taka's other mistress...

Taka and other gang members take pictures of Miyuki when they rape her, and then use them for forcing her to have sex in classrooms, teach class naked, and do more extreme sexual plays. Through these assaults, Miyuki realizes that she's a masochist and starts to indulge in carnal desires. The vice-principal, who is a sadist, finds out about Miyuki and begins to use her as a masochist slave...