One afternoon on a weekday, a young man posing as a lingerie salesman arrives at Harumi's apartment. While initially flustered by his flashy and bold lingerie pitch, she gradually finds herself consumed by lewd fantasies. Sensing her inner desires, the man suddenly lunges at her, escalating the encounter into passionate intimacy. With pent-up frustration boiling over, Harumi ignites with passion at the sight of his strong, virile body. Losing control of her instincts, she plunges headfirst into an intensely heated affair.