Cloud Walker

Arais: demons that prey on weak-minded humans, plunging their victims into despair and taking control. A selected few of humans who possess supernatural abilities, under the organization of Cloud Walker, are the only ones who can deal with them. Through an unfortunate encounter with an Arai, Kai Wattana is forced to make a deal with one of these demon himself... or is it the other way around? Source: Webtoon