Let's give one "fortune" to you who opened the box. A small wooden box found by Chiaki, who has become lonely, in the relics of her grandmother. When you open the wooden box labeled "Fukusuke", you will find a little boy inside! Strange and warm days with Fukusuke, who gets a little older every time he gives Chiaki "fortune". However, in a short but happy life, Fukusuke's "power" has begun to suffer.