Havoc is a young demon who has never been to human world. When you accidentally summon him he feels happy to finally getting a chance to lure a human into a contract to get the human's sole for granting a wish. If the contract is not accepted, then he and the human have to sacrifice 3 people in the next three days so to him to return to Hell and to stop the apocalypse. Havoc 's sly, enticing, but has a personality of a middle schooler who thinks everything is all fun, jokes and games.