The Way of Controlling Demons

Demon, a visitor from another world. They have all kinds of strange appearances and incredible abilities. They travel through time and space and come to this planet called Earth with various purposes. Some do it to seek the truth, some do it to satisfy their own desires and ambitions, some do it for work, and some do it for survival. No matter what the purpose of their arrival is, they will always bring some disturbance, destruction, and sometimes even destruction to the world. However, since the beginning of human civilization, there have been some people with special abilities who hide among the crowd to deal with demon-related matters. They are the way to control demons.