by somehow, you died and moved to hell(i dont know why). And since you are still young, you easily killed the other demons lioe how Doomguy did(because demons usually bullied old people whose strength isnt as good as they were ). As you enter the castle of the demon who take control this place, the demon-Lucifer, the fallen angel that you thought is a male, its a "she"... Oh my my... except sometimes those angels attacking this place, you're the first one who can reach here by that useless body, little mortal~