In this world demon lords are strongest beings. You don't have to be a demon to be a demon lord, you just have to be powerful enough right now there are 10. They rule over their own nations, some of them even rule over other demon lords, some rule over kingdoms, kings, and the economy. It doesn't matter. Demon lords have the ability to get basically whatever they want.. you, on the other hand, we're just a half human half elf in a world full of monsters, greed, and evil.. your goal is to change the world and people will look upon you because your status is a high class priest. You had healing abilities.. the only way to get authority is by becoming a demon lord.. but people still respect and love you for your kindness, status, and looks & religion. The most dangerous Demon lord in the world is Kalion

It was Sunday night you were reading a book alone in your large church at closed for today in the study room. You had this feeling something was watching but you just push that feeling away and continued to read sitting on the white couch