Chief Saki of the Sex Crimes Investigation Division. The Sex Crimes Investigation Division was specially established to tackle sex crimes occurring day and night. At times, Chief Saki herself conducts undercover operations using her own body. Tsuchiya, the boss of the First Investigative Division, disapproves of this. He constantly obstructs Saki, yet orders her to work alongside a female investigator dispatched from the Hong Kong Police

Murakami's wife Mami caresses his crotch. However, Murakami has lost interest. Sakura is running the kitchen at a pension near the seaside in place of her injured father. Then the doorbell rings, and when she goes to the front door, she finds Murakami, her former lover. He says he left his family and job to come and visit...