Dragon dreams, according to oneiromancy ideas, indicate the fight of losing yourself to your own rage. Souya Kuroi awakens from a nightmare in which a gigantic dragon destroys everything around him in a blaze of rainbow-colored light. After learning that he lost his parents and memories in an unusual accident, the waking world becomes a nightmare in and of itself. With this dream as his sole recollection, he is forced to rely on his two unusual guardians: the spunky and energetic maid Ginko and a massive cat known only as "Sensei."