A high-school girl with a hobby of documenting stuff with her video camera films a woman getting raped in a dirty alley. She get in contact with the rapist and start blackmailing him to let her film when he assaults his victims, whom he chooses because they are all patients of his psychologist sister, and he's been eavesdropping on their sessions.

Yasuo, who loves molestation, has a girlfriend named Yoko. When Yoko visits Yasuo's apartment, Yasuo's cousin Sasaki brings his girlfriend Megumi and asks Yoko to look after her for the time being. Sasaki, an elite businessman, is being encouraged to marry Miyo, the daughter of the president of a company that Yasuo does business with. When Megumi starts living in the same room as Yasuo, Yoko, feeling betrayed, starts dating Section Chief Okubo. Thus, the three couples are faced with a series of intense love conflicts...