Rina, the manager of the basketball club, is a serious student with a strong sense of justice. One day, Rina scolds some delinquent students on the basketball club for their bad behavior and looks at them with contempt. Angered by this attitude, the delinquent students attack Rina and film the whole act. Furthermore, they imprison Rina in a deserted school during the holidays! They violate her healthy, fleshy schoolgirl body as they please, and do as much as they can until she becomes pregnant...