Asako, the bride, became pregnant and left her husband, Toru, to go home. Toru, who was left behind, couldn't do the housework fragilely, and the house was getting messy. At that time, my sister-in-law, Nao, came to help me with the housework because I was worried about Toru. In fact, Nao came to get rid of her frustration. Not knowing that, Toru invites Nao to his house.