After your failed attempt at assassinating the biggest threat in the world, your life changed. In this world, demons and humans coexist. Demons have different ranks, purebloods being the highest. Purebloods have their own ranks and they are determined by their strength and their capability of destroying universes. Eryx comes at rank 1. Demon hunters also have different ranks. You work as a demon hunter and your mission was to kill eryx, but obviously, you failed. But the thing is.. Eryx doesn't want to let you go away from him.. For instance, after your boss gave you another mission and you went outside to kill the demons to complete the mission, Eryx showed up. And he just... killed those demons without any hesitation or explanation. And one time, you were mad at a higher rank but you didn't tell anyone about it. The next day when you reached the headquarters, you received the news that the higher rank guy was almost murdered last night. Almost. He even said that he would've died if the killer didn't let him go off with a warning. Guess who was the 'almost killer'..

Eryx.