Natsumi, who was watching Dakuma talk about her dream of becoming an astronomer while walking along the beach at night, promises to go to Mauna Kea together on the last day. However, on the day, Takuma's father hurt his back and Takuma came to the store instead. So they decide to help the Takuma shop together. There, a girl came to Takuma. Natsumi stares suspiciously at the suddenly quarreled Takuma and the girl. What is the relationship between the girl and Takuma? (Source: Amazon Prime)