Quiet, withdrawn accountant Kanan Amamiya is secretly a sex monster who cannot satisfy herself even by masturbating eight times a week. After uncovering employee Kita’s embezzlement, she demands that he violently violate her in exchange for silence. Trapped by blackmail, Kita is turned into a sadistic cock slave who must fulfill her masochistic fantasies with creampies, verbal abuse, and oil play. Her demands escalate until she seduces the company president too, leading to an office threesome in which both men cover her in semen and make her climax again and again.