Miyu Kōzuki's parents had moved to America to join the NASA. Miyu has been told to live with her parents' friend. She arrives, and it turns out to be a temple. There, she meets the monk, Saionji, and his son Kanata. The monk leaves for India leaving Miyu and Kanata behind. Shortly after, a UFO flies into the house, and there is a baby and a "sitter-pet", Wanya. They all live in the temple together.