Based on the erotic game by Liquid.

The Azuma family is a feminine family and their eldest daughter, Haruka, is the headmistress of St. Orchis Academy, while their second daughter Suzuna is the student council president and their youngest daughters, the twins Himari and Komari, are enrolled in the school. Originally an all-girls school, the few male students at this school were unfairly discriminated against. Cornered by the family's oppressive rule, the male students rose up and humiliated and raped Himari and Komari one after another. This leads Kei Kuga to trap the headmaster, Haruka, and take full control of the school. The boys resentment is directed at the Azuma sisters and they are exposed to the vomit of lust.