Apartment Wife: Keiko's Insane Sex Life (1990)

A high-rise housing complex. Keijiro Adachi, the managing director of a small and medium-sized company, and his wife Keiko also live here. When her husband left, Keiko went out on her bicycle. Keijiro passed an exhausted man at the station. He is Yasushi Naito, who lives in the same housing complex...