What is real? What is just a dream? How can you be certain one is not the other? When dreams seem real and reality fades into a dream, where does the truth lie? For Tohru Naitou, a young man forced to experience lucid dreams when he rests, that question is not an easy one. Though his only rest from the nightmare is exhaustion, a girl claims she can put an end to them--but is she real? Or is it all a happy nightmare?