Nakazawa, who married Sumire, a woman a year younger than him through an office romance. Although he was living a happy newlywed life with his young and cute wife, there was one problem: he had been having erectile dysfunction since they got married and couldn't have sex properly... Just then, he happened to run into Ikeda, his former boss from the company where he used to work. As they talked about each other's recent situations, the conversation turned to sex life, and Nakazawa consulted Ikeda about his problems with his wife. Then Ikeda suggested that they swap wives with his own wife Ruisa and Sumire...
