Ryousuke Sakiya is a first-year student at Kouryo High School, gifted with immense psychic abilities that let him perceive a hidden world of spirits and energies invisible to ordinary people. This power makes him the central figure in a renewed war between two ancient factions: the Kuu no mono and the You no mono, whose leaders were sealed away nine centuries ago and have now returned through reincarnation.

The hostile You no mono hunt him for reasons yet unknown, forcing the Jutsusha faction—including Jukyuro Satomi and Kisara Izumi—to intervene as his protectors. Though shielded by these allies, Ryousuke fiercely resists involvement, wishing only to be left in peace. Yet despite his reluctance, he is repeatedly thrust into the heart of the conflict, struggling with confusion and the gradual realization that he unwittingly holds the key to this ancient struggle.