After Kazui rejects Rai's love, Rai loses himself in sin and hardcore partying. But when his room mate, Mamiya, finds him and tries to make him snap out of it by dragging him home, Rai does the unthinkable to Mamiya in a fit of rage and despair. Having lived a lifestyle doing whatever he wants with no remorse, Rai is suddenly surprised to feel guilt in the aftermath of his night with Mamiya and does his best to apologize. It is only after Mamiya agrees to live with him again that Rai realizes he has growing feelings for the boy. But, Mamiya can't forget what Rai did to him. There is also the problem of Mamiya's unrequited feelings for his best friend Kei. Can Rai convince Mamiya to forgive him, to let go of the feelings for Kei and become Rai's lover?
Sequel: Koi ni Nattara
Adapted from Koi no Katachi (according to Baka-Updates)