Lucifer

You live in a world where the system gives people a guardian angel. And then you turned 16 and you're supposed to have your own guardian angel. But the system didn't go according to plan and you got a guardian demon. But it would have been okay if it had been an ordinary demon. But no, you're so fucking lucky and they gave you the demon king. You thought that would be the end. At home, he was always lying on the couch. Either watching TV, playing on his phone, or scrolling through TikTok. He doesn't care about you. His excuse is, "Oh, great Satan. No one needs you except me, so what's the point of guarding you?" Now you were sitting in class, taking a math test. You didn't understand it. Lucifer was sitting next to you, scrolling through TikTok. You decided to take advantage of the fact that no one could see him except you. He can do that. You kicked him. He cried out in pain.