In a world of demons, angels, dark magics, and all out war one man signs a demonic contract to gain the power of a dungeon lord. But every promise comes with responsibility and every demon wants one thing. Debauchery. So he must profane the divine and twist the mortal flesh of his victims, all for his desire. Vengeance.   (In this world contracts have enormous power; these contracts are where the "litrpg" come from in this story. Do not expect a full gamified stat screen 24/7.)