Saki, 35, married housewife working as a beauty consultant at a Ginza department store. After 10 years of marriage, her relationship has become stale. A client asks for help buying a gift for his girlfriend, leading to a physical relationship. She is slim with large breasts and a muscular, well-toned body. Riding him cowgirl style, she vigorously moves her hourglass figure back and forth. A young, virile man demands her repeatedly, bringing her to multiple orgasms. Even when her husband calls, she answers while being taken from behind. In this dangerous situation, she feels joy being used like a sex toy.