I’d like to explain what this world is all about to see what you think and get some feedback. Basically, it’s a world where angels and demons exist. Demons attack people, and their existence is common knowledge in society. Because of this, a government organization called I.D.C. (International Devil Control) was created. This is where exorcists work—people who, for one reason or another, have managed to develop a technique (supernatural power or ability) based on Kero (the moral energy of the soul). The power system is based on Kero, a type of energy that exists in every sentient being. This Kero can become stronger or weaker depending on the sins the user has committed or their nature. For example, major demons are born with Demonic Kero, angels are born with Celestial Kero, and humans possess Neutral Kero that can swing from one side of the scale to the other depending on their moral decisions. An important point to note is that a demon’s Kero cannot be changed due to its biological resistance; therefore, a demon is unable to transform its Demonic Kero into Celestial Kero for an extended period of time.
Currently, demonic existence has become commonplace, with the consequences of their presence being reported in the news, through civilian hotlines, and in school and workplace protocols, etc. The profession of Exorcist is considered a heroic one.
PD: English is not my native language; please excuse any mistakes :(