Miyono Hiyoshi is 53 years old. She is a housewife and mother of two who works in the produce section of a nearby supermarket. Her family life is happy and her job is going well. On the surface, Miyono lives a happy life, but behind the scenes, she has thoughts that she cannot tell anyone... As a result of devoting herself to being a good mother, she is no longer able to express her "womanly" side at home, and "I haven't had a husband for the last 15 years." The sense of crisis that she would decay as a woman drove her to appear in this film. She has had sex with three men, including her husband. Of course, this was her first experience of infidelity. But her head is always full of lewd fantasies, so watch as this faithful and lewd wife attempts to penetrate a penis for the first time in 15 years.