Newly appointed teacher 'Ansai' saves her childhood friend and fellow teacher Kitagawa from being extorted by students, but ends up being raped in revenge. The situation escalates, and when she is appointed as the swimming club advisor, she is forced to wear a swimsuit and used as a sex toy by delinquents. The delinquents, not satisfied, make Kitagawa watch Ansai's rape, and even he gets an erection from seeing her developed breasts, ultimately leading to her being gang-raped. The woman with the godly breasts finally enters a full-blown rape drama!
