The ascent of the SSS rank primordial of corruption

As a young lord from a noble family, Ethan was destined for a life of luxury and glory, but unfortunately, fate was cruel and his awakening ritual turned him into a cripple, condemning him to a life of pain and suffering that would only end with his death. As he burned to death, everything seemed to be finally over for Ethan; however, from the depths of an endless abyss, an primordial being opened his eyes and perhaps out of pity or curiosity, gave Ethan a gift: the system of corruption. Now, with this new power, Ethan will fight to reclaim what is rightfully his. What do you need to know before reading this novel? 1: No Netorare. But there will be netori (the protagonist stealing wives). 3: Powerful protagonist, heir to ancestral power. 4: Domination by sex, enemies becoming lovers, kingdom building, and massive military confrontations. 5: Explicit violence and explicit sexual content. [Content warning: This is a smut novel, expect explicit sexual content and huge melons.]