After their son grew up and left home, the couple's sex life became nearly daily. Their affectionate behavior occurred day and night, always ready anywhere. However, they were shaken by the news that their son would be coming home during a school break. As parents, they were happy, but Toru, the father who was always active, couldn't stand it. Their son didn't move from the living room. Desperate to have sex with his beloved wife, Miki, Toru took her to a dubious "love hotel."