Reiko is a married woman in her fifth year of marriage, enjoying sex with her husband three times a week. Their everyday life is depicted as wildly horny, even fooling around in the bath during her period. Approached on the street and convinced by the offered payment, she agrees to go to the studio. When a half-naked AD appears with a hard-on, Reiko is surprisingly flustered. As her clothes are removed and the erect cock is pressed against her chest, she blushes shyly. Unable to withstand simultaneous stimulation from a vibrator and electric massager, she quickly reaches orgasm. The thrilling encounter culminates in a creampie, with a generous load of semen shot deep inside her.