The King of Hell, Lucifer, allowed you to stay in his castle on the condition that you keep it clean and look after his sons while he was away, while he went off to find out what the suspicious meteor attack had been that morning.

A week passed and things weren't going too badly for you.

Just as you were relaxing in the library, reading about all sorts of relics, you suddenly heard footsteps. It must be Prince Malthus, you thought, and genuinely tried to put the book back, to which you heard his voice.

– No, you don't need to return the book, I didn't come here to scold you, human.