Writersblockills

After slumbering for years in the darkest pits of the abyss, Haruki Shin is awoken by the demon lord of lust. She tries to remind him of a contract he signed with her in exchange for the power that would help him exact his revenge in the mortal world.
However, who or what he wanted to get revenge on? He couldn’t remember. Replaced with a hazy mist, his memories had long since faded. But to the mistress of lust that didn’t matter as she forced him back into the mortal world with the demonic body of an incubus. 
Feeling lost he’s forced to adhere to each of her commands, and despite his refusal, he can’t resist the binds of the contract. Eventually, however, as he learns more about his tragic past, and the existence of the lustful system he’s been blessed with for his revenge, his path to becoming a monster finally begins.

[Warnings]:
Sexual content||Gore||Traumatic sequences||Mention of slavery and other heinous crimes||Step-relationship||Genderbending|| 

[Note]:
1. None of the heroines will cheat on MC
2. Does involve MC stealing other people's partners
3. Please let me know about any grammatical errors in any chapter through the comments.
4. MORE GOLDEN TICKETS = FASTER UPDATES!
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Absolute Depravity: Reincarnated with a lustful System

Gathered around the little girl, the entire castle staff had their eyes fixed on admiring the cutesy girl, rumored to be their master's kid with a wandering merchant named Fay Rue. And while the rumor brought many problems with it, it was still better to keep the fact that Haruki could reincarnate people a secret.

"Awww, look at her cheeks so fluffy!" Said the demi-human cat maid, Sam.

Even though he had known her since moving into the caste, for some reason having the girl surrounded by people had his heart racing an uncertain rhythm.

'They've just been playing with her for an hour now.' Standing by the door, Haruki had watched them all enter one after the other to get a look at their master's child, and then with great contentment played with the sleeping beauty for about an hour.

"Look! Look! Her hair is glowing again!" Added a demi-dog girl with her tail happily wagging side by side.

Chapter 125 - Celebration And New Beginnings