The story is about a human boy that fall in hell and the demon king that takes care of him. Anything that I could say about them would be a spoiler, because the gimmick is simple. Every chapter is a episodic adventure of them in different funny situations, it's cute, but, it's repetitive. I don't want to continue it because I have the feeling that this is endless and the history is not going anywhere, maybe that's the objective, I don't know. But if someone asked me "what do you think of this manga?" I would say "it's cute, but nothing special".