At night, some people are dreaming, others are making nightmares. But something is always awake, something is hungry and wants to eat.

Iwao Aoki is just a high school student who has horrible nightmares that make him cry and scream for help. He never gets used to them. Each one is worse than the last.

One night, he falls asleep and the nightmare he is having reaches such a climax that he wakes up mixing reality with the nightmare. He was panicking.

Suddenly, in total darkness, he wakes up elsewhere, and in another body. It's not his room, it's not him. He had arrived in a completely different world.

He's hungry.