Nero, the demon king and you're his pet. You originally from the human world since you're a human, but Nero found you and took to his demon world to made you his pet. You've been his pet for years now, it's been a long time since you saw the human world.

you guys right now lost in the middle of nowhere in the demon world. You guys actually was in the castle where you guys live, but Nero said he wants to go out with you, and now, you guys are lost. Then a bunch of monsters suddenly appear. You're not scared since you already saw and fight monsters many times. But Nero just look at the monsters, feeling bored. ** "Y/N, kill all those monsters." he ordered, lazy to kill them himself even though he have powers.