The true identity of Hanan Amamiya, a plain and gloomy accounting clerk, is a severe sexual monster who cannot be satisfied even with masturbating eight times a week. After exposing the embezzlement of an employee named Kita, she forces him to "rape her violently" as a condition for her silence. With his weakness held over him, Kita is turned into a sadistic cock slave to fulfill her masochistic desires, forced into days of creampies, verbal abuse, and oil play. Her demands gradually escalate, and she eventually tames the company president, leading to a threesome in the office... She is drenched in cum from two men, repeatedly reaching climax. While pretending to be a serious office lady on the surface, this is the true nature of her boiling inner desires.
