- Boy love and gore warning - Deliria: a more or less temporary disorder of the mental faculties, as in fevers, disturbances of consciousness, or intoxication, characterized by restlessness, excitement, delusions, hallucinations, etc. This state of psychological disorder usually occurs when one consumes an over-dose of a heart of deliri; a human who turned into a demon by consuming other deliri hearts. When at maximum, the consumer may turn into delri themselves. X Hunters, slayers who specialize in destroying deliri, eat their hearts to gain demonic power. Unfortunately for X Hunters, deliri hearts are especially delicious, creating an even larger appetite to eat more of them.