Asuma discovers a postcard inviting him to a school reunion. However, he doesn't remember receiving it. He goes to the reunion and sees Yuki Kasama, a girl whom he once had a crush on when he was at school. He feels rather embarrassed and doesn't speak to her, but she goes over to talk to him after the reunion. After talking to her, he reluctantly asks her on a date. The next day they go to the museum and planetarium. Asuma has to go to the toilet but when he returns to his seat Yuki has gone. In the seat where she sat there is a postcard from an exhibition of photographs...