My Virtual Girlfriend - Chapter 101: One of Us (Vote for recommendation!)

If an ancient scholar searches through the mists of history, he or she will find such an existence:Pope of the night,Angel of the Creator,The hidden emperor of the empire,…He is also the perfect mentor;Wanmen’s guidance,The original source of pain...No one knows where he came from, only that he was born with knowledge and has been with him for years.Let us chant his honorable name together:Spirit of truth, pure man, master of dreams, supreme beyond all eternity

A teenager named Evan Mason was reincarnated into the magical world of Harry Potter and goes to school at Hogwarts!
With only his knowledge of the future and great talent for magic, he takes the path towards the top of the magic world, only to realize that ever step he took, changed everything!

- Description from Novelupdates

Chen Rui, an otaku from earth, is reborn into a human body in another world, who falls into the legendary evil, brutal world of the devil called Mozu where humans are treated as food. He has to survive while facing horrors of the devil, violent dragons and a variety of powerful enemies by depending on a strange super system chip and his wits. Surrounded by Devil’s beauties such as black-bellied lolita princess, cold queens, violent dragons, charming poisonous devils …

Wanting to live in the Devil’s world is hard! Wanting to live in the Devil’s world as a human is harder! Wanting a human to be the devil’s son-in-law is hardest!

Let us see how a small otaku uses power and strategy step by step starting from an ordinary human to writing a legend as the devil’s greatest son-in-law.

Before Wufu was reborn, she had no idea there was such a thing as rebirth. Only after her rebirth did she realize Heaven must have thought her previous life was too smooth, so it sent her to suffer in this ancient land where morality, decency, and the Female Precepts were held in high esteem, pitiful indeed! From being a master jade carver to having her soul transmigrate into a farm girl with a wretched background, she was bullied and humiliated. Even the bun-selling mother advised her that forbearance is gold? Bullshit! She could endure, but her other identity absolutely could not—robbers, swept away; insults to her mother, you're crippled... Wufu has a saying, for every insult and humiliation, I will repay a hundredfold. But what's with this one? He doesn't bully her; he only wants to sleep with her? And he even dares... to mount her? Well, a lord can endure, but Wufu cannot. Mount him back, life or death, a hundred years, neither owes the other anything!