Asako and Tomoko, who live next door to each other in a certain apartment complex, are housewives who frequently chat with each other. Asako, who is on good terms with her husband, Keiji, tells Tomoko about their nightly activities, and Tomoko, who is in a lull with her husband, Shinpei, envies her for it. One day, Keiji and Shinpei, who had never even exchanged greetings before, happen to hit it off and go out for a drink together. There they meet a pair of office workers...
