Kaoru Hanabishi, a college student who lives alone, encounters a beautiful but confused girl in a kimono at a train station. He offers to guide her to the address she seeks, only to discover that it is in his neighborhood and leads to an empty lot. Uncertain of what to do next, Kaoru invites the distressed girl to his apartment and asks for any additional clues to her destination. She shows him a photo of two children, whom Kaoru instantly recognizes as himself and his childhood friend Aoi Sakuraba. The girl is, in fact, Aoi herself, his betrothed who has come all the way to Tokyo to marry him. Her revelation is not only surprising but also reminds...