At times, getting lost in one's own thoughts can pose a problem, but what if you had to be wary of other people's fantasies? Yumeji Fujiwara has an exceptional ability to foresee the dreams of others, but his own dreams have taken a bizarre turn where he's constantly pursued by swarms of cats. To his surprise, Yumeji learns that the head of the dream cats desires to inhabit his physical form to enter the Real World. When a stunning girl drops from the sky and declares herself a Dream Demon on a quest to return to the Dream World, things take an even stranger turn. The boundary between what's real and imagined shatters, leaving Yumeji to confront surreal dreams and a dream that's now come to life. He's bound to experience endless sleepless nights.