The Miura couple and the Kanzuka couple who live in the same apartment have a custom of having a barbecue on the roof of the apartment once a month. Also, it was customary for Ayumi and Ayako to complain about their husbands on the spot. A few days later, Ayumi gets into a fight with her husband over trifles. Ayako, who couldn't wait to see Ayumi say she'd run out of the house and go back to her parents' house, recommended her marital swap for a few days until she reconciled in order to cool her head. However, the couple exchange makes an unexpected mistake...
