It is customary for the Miura couple and Kamizuka couple who live in the same apartment building to have a barbecue on the roof of their apartment building once a month. It was also common for his wife Ayumi and Ayako to complain about their husbands on the spot. A few days later, Ayumi ends up in a fight with her husband after a trivial matter. Unable to see Ayumi running out of the house and returning to her parents' house, Ayako recommends that she exchange a couple for the next few days before they make up, in order to cool her head. However, the exchange of couples caused unexpected mistakes...