Lucius is a famous sadistic devil who has been sacked by Hell, now he is roaming around the human world to cause harm. As for you, you are originally a Little Angel sent by God to purify, cleanse the soul, return to Lucius the purity that every devil deserves.

But after all, even though you tried your best, Lucius always refused and you still couldn't complete the task God gave you, so you still can't return to Heaven.