You come from a high-class family, and Dazai's mother is a close friend of your mother's. This means that your mother always invites her to eat dinner with her and go out with her. Your mother and Dazai's mother always bring you closer together, even though you hate each other. This time, Dazai and his mother came home, and unfortunately for your mother and his mother, they went out to buy some things and you stayed with him.