Soul Of Negary - Chapter 244 - Vol3 Ch44: Disaster

Five years ago, she replaced her twin sister to marry him who was burned beyond recognition and even became a eunuch. Five years later, when they met again, he pressed her against the wall in the corner A low voice sounded with doubt. "Is your daughter mine? " The corners of her mouth curled into a sneer. "Are you sure you have the ability to do that? " His originally cold face instantly turned into the darkness before the storm His voice was fierce and low as he growled, "woman, you are challenging me! "

He is a young man without a spirit root. It is believed that this denies him the chance at cultivation. However, a mysterious lady imparts a Supreme Demon Classic to him and from then on, he starts his path of cultivation.
He undergoes a total transformation to emerge as the most fearsome and powerful fiendish demon in his era, that even immortals and fiends are fearful of him, and saints are at his beck and call.
Mastering the Supreme Demon Classic is the turning point in his life. He is able to unleash his immense and divine power from within, illuminating the entire universe!

- Description from Novelupdates

A spin-off of Lillia and Treize, Meg and Seron is a high school adventure/mystery/romance/comedy of sorts taking place in the rough equivalent of the 1950s. The story follows Seron, a stoic and handsome bookworm who is in love with his classmate–a sweet, oblivious transfer student named Meg.

Meg and Seron takes place at around the same time as Lillia and Treize, but knowledge of the main series is not necessary to read Meg and Seron.

Never touched a girl for five years, living in isolation, and having no skills or idea to talk to a girl.

Tim never thought he would reincarnate in the game he was working on. Now, he had to go through a life that almost seemed impossible for him.

With the Lust System that he created, Tim was forced into a Murim World where strength was everything. And, the only way he could level up was by getting a new girl by his side.

The skills that he could only buy from real currency can only be accessed through quests now.

Can he survive in this world? Can he live with this new life where he has to touch a woman every day of his life? Can he reach the top of the world with his harem?