In the class that teacher Rin is in charge of, there was a student, Takao, who hadn't been to school for nearly a year.Rin, who feels that she is responsible for the situation he is in, goes to visit Takao's home, accompanied by her colleague and her husband's teacher, Keiichi.However, Takao's house was a den of men who run a heinous yakuza business.Attracted by her beauty, Rin is framed by Takao and her family, and is subjected to endless sexual acts in front of Keiichi's eyes...