Ai comes to the all-boys school where Reiko works as a vice-principal to teach a special class. However, Ai still doesn't know the true purpose of the class. A curriculum that collects virgins in the school and makes them abstinent. If you can hold back your ejaculation until the last day, you can have the best virginity graduation ceremony... Led by the devil's slut vice principal Reiko, the natural S librarian Chihiro, and the nasty de S insurance doctor Aoi's merciless provocations one after another. Students who ejaculate and drop out. And the quality of a slut of love awakens...