Phantoms: supernatural beings such as ghosts or youkai that were previously regarded to be superstition. When a virus that infects the brain spreads throughout society, people's vision of the world alters because the fabled entities are revealed to have lived with humans the entire time. This virus has also had a profound impact on the following generation, allowing them to develop particular powers that they may utilize to battle hazardous phantoms. Haruhiko Ichijou and Mai Kawakami are two of those who have been gifted such power. Haruhiko has the capacity to call and seal phantoms through drawings, while Mai imbues martial arts with the strength of the elements. They constitute Hosea Academy's Team E, together with the friendly ghost Ruru.