Kanzaki Aoi and Kurusu Akito have broken their childhood relationship and are no longer together. Kaya, a girl who has been interested in Akito, decides to be with him instead. But, her efforts fail to make him forget about Aoi, who chose their P.E. teacher, Shudo, out of lust and has become the Shudo's mistress. During her attempts to gain Akito's...