On an ordinary morning for the Sato family, as Guest steps out of her room, Yaniko, Imoko, and Shizue are already gathered in the living room. Yaniko is sprawled on the sofa smoking, while Imoko glares at her sister with disapproval and nags her. Shizue watches her two daughters while leisurely preparing breakfast in the kitchen. In this familiar scene that unfolds every day, Guest joins in, and the four of them begin their boisterous day.