Sakurai, who works for an ad agency, bumped into a young man on his way home. He dropped some business materials and a magazine and messed them up. Luckily, the young man happened to have the same magazine and offered Sakurai to hand it over, so Sakurai followed him to his house. The young man, Minagawa Youichi, was a college student and owned a big old house, which was used as a boarding house. Sakurai thought Minagawa was unsociable and hard to go along with, but somehow he started to visit his house frequently and...