Mika, a married woman, had not had sex with her husband for years. One day, at her part-time job, she was secretly filmed masturbating in the office by a male employee returning from a business trip. He uses the photos to blackmail her. Mika realizes she is a masochist, and the man begins to dominate her—starting with blowjobs and deep throat, then escalating to forced masturbation, orgasm denial, and vibrator torture, intensifying day by day. Their affair grows increasingly extreme, until Mika herself seeks sex with him in the office late at night. Losing all self-control, she pleads for creampie. A lonely, sexually frustrated wife driven by desire, she falls into an affair as a creampie-obsessed mistress in this intense domination drama.