Impurity

Impurity are monsters that reside in a world named Magano, but at times break into the human world. Those who fight the Impurities are the Exorcists.

Both Magano and Impurities are said to be born from the depths of people's sins and karma.

Impurities vary on appearance and size, but usually share some common traits like dark skin and net/number sign on their chest/stomach.