Sei Dorei Gakuen

Ryunosuke is a pedant whose job is to train women to suit his clients' desires. When he receives a request from the chancellor of St. Martius Academy, he is assigned three beautiful girls: the twin sisters Sakura and Fujine, and the young lady Wakako. He sets up a trap for them and begins teaching these innocent virgins how to handle men's sexual desires.

The training involves a series of extreme acts, including gang rape and servitude to classmates. As the story progresses, a slave student named Miyu and the chancellor's secretary become involved, leading to a fearless sexual feast at the sacred school.