MTL - Machine Storm - Chapter 401 Golden Dragon Soul Book

What happens when a scientist from a futuristic world reincarnates in a World of Magic and Knights? An awesome MC is what happens! A scientist’s goal is to explore the secrets of the universe, and this is exactly what Leylin sets out to do when he is reincarnated. Dark, cold and calculating, he makes use of all his resources as he sets off on his adventures to meet his goal. Face? Who needs that… Hmmm… that guy seems too powerful for me to take on now… I better keep a low profile for now. You want me to help you? Sure… but what benefit can I get out of it? Nothing? Bye. Hmmm… that guy looks like he might cause me problems in the future. Should I let him off for now and let him grow into someone that can threaten me….. Nahhh. *kill*-

Alternative: Leylin is transported from an advanced technological era into a medieval world— except there’s magic. Equipped with “only” his quick wits and an A.I. chip fused to his soul, he sets out to become the most powerful magus the world has ever known. In a land divided into the Light and Dark Magi, the weak can either be cattle or disposable slaves. Only the strong can determine their lives, and only they have the luxury for virtue. Yet strength is only a tool for Leylin, like any other. His goal, in the end, is his own.

On a sunny afternoon, Kael finally received the long-awaited admission letter and came to Hogwarts, this millennium-old prestigious school.Dumbledore: Kael is a good child who is upright, brave, kind, and sincere.Professor McGonagall: What the Headmaster said is right, Kael never violates the school rules.Snape: Ah yes yes yes...Quirrell originally thought so too, until one day, he pushed open the trapdoor and jumped into a room full of Chomping Cabbage...

Xiao Zheng was forced into signing a marriage and employment contract after a one night stand with the female executive of New Arcana Group.

During this time, he encountered many interesting female workers which he named them based on their unique characters…

Ice Goddess… Tyrannosaurus / Overlord Flower… Gentle Boss… Mischievous School Girl…

- Description from Novelupdates

A master assassin transmigrates into an interstellar era.

Other players were responsible for competing in the e-sports arena, while he was responsible for stringing up and beating up the other players.

His sword was hidden during the peak of day, and he was a gentleman who arrived in a flash of light;
As a vanguard of the eternal night, he was the variable between life and death in the world.

“As you know, the Star League’s difficulty levels are arranged in this way:
Paradise < Simple < Normal < Difficult < Nightmare < Hell < [Tyron Odin]”

- Description from Novelupdates