The first half of the 1990s, in Hokkaido, all begins encounter and separation of Towako, with a mysterious power and Natsuhiko Hibino, which have a mediocre live.

Classmate Singh bird of alien twins who are interested in Towako sister and piggyback boys and girls is "fate distorted" his father black snow-rare childhood friend suggesting Natsuhiko and behavior speculation they interlaced, various mystery will become increasingly apparent by the presence of the mystery "ANGEL+DIVE."