Nana's husband has been transferred and they have decided to move to a rural area. However, she can't help but worry about leaving her brother-in-law, Tamotsu, who lives with her, alone at home. Meanwhile, preparations for the move are underway, and her husband is working overtime every day to take over. The days of misunderstanding continue, and Nana feels lonely because he doesn't pay her any attention, so she goes out drinking with Tamotsu, but she can't help but ask for a kiss because she is bored. Their relationship changes drastically after crossing the line, and now that their inhibitions are loose, kissing each other when her husband is away becomes a daily occurrence...