Plot: Nozawa, a detective, had an unusually strong sexual desire, but because of his job, he could not hang out with ordinary women, so he persuaded his wife to go to a swapping club. What he was waiting for there was a couple who happened to live in the same apartment building… The two couples who have switched partners become entangled while being watched, becoming male and female
Shirō Shimomoto
Chiemi Akimoto
Shūji Kataoka