Phantom Nightmare

The world is divided into the real world and the fantasy world of Nightmare. The subconscious of all things breeds negative nightmare creatures "Incubus"; a few people are born with the talent to enter dreams, control illusions, and kill Nightmare, and are called Nightmare Controllers. The Phantom Ruins Academy is the only official institution in the realm of other worlds. It is located in the gap between reality and the Nightmare Ruins. It specializes in housing and training nightmare-controlling teenagers. Its duty is to check and balance the out-of-control nightmare spirits and prevent the nightmare spirits from breaking through the illusion and consuming the real world.