Kaoru Hanabishi, a college student living alone, encounters a beautiful but confused girl in a kimono at a train station. He offers to guide her to the address she is seeking, which happens to be in his neighborhood, only to find it is an empty lot. Unsure of what to do next, Kaoru invites the devastated girl to his apartment and asks for any further clues regarding her destination. She provides him with a photo of two children, whom Kaoru immediately recognizes as himself and Aoi Sakuraba, his childhood friend. It turns out the girl before him is Aoi Sakuraba herself, his betrothed fiancée who has traveled all the way to Tokyo to marry him. Her revelation is not only surprising but also stirs the deepest part of Kaoru's memory, reminding him why he left the Hanabishi family in the first place.