It is customary for Miura and Kamizuka, who live in the same condominium, to have a barbecue on the roof of the condominium once a month. - Also, it was a rule that his wife Ayumi and Ayako would complain about their husbands on the spot. - A few days later, Ayumi quarrels with her husband for a trivial matter. - Ayako, who couldnt see Ayumi telling her to leave the house and return to her parents house, recommends her couple exchange for several days until her reconciliation to cool her head. - However, the couple exchange made an unexpected mistake ...