Naruto: Kurotsuchi Mayuri - Chapter 37 - 21.2 : Worm’s Evolution!!

He was supposed to be just a guardian.But love doesn’t follow rules.After losing his mother, 18-year-old Kai finds himself under the roof of his cold, powerful stepfather, Sebastian Vaughn. What begins as silence turns into lingering glances, late-night tension, and a love Kai can’t run from—even if he tries.But Bast isn’t just any man. He’s possessive, broken, and hiding dangerous secrets… including an ex-lover who wants to destroy everything. As feelings grow, so do the risks.How do you escape a man who says he’s your everything—your father, protector, friend… and lover?

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.

Waking up in the body of a 6-year-old boy a few years before Cintra is destroyed, Madara receives a system that gives him the ability to gain the powers of Uchiha Madara.[The peak of Uchiha Madara's system is before he becomes the ten-tails jinchuuriki.]The system's percentage does not stop Madara's power, but rather the system's release. After all, I don't want to see a character who goes around killing everyone from the beginning of the story.

In thus high-martial world, Lin Chen has a special ability that every seven days he traverses to the Cultivation Realm and comes back after another seven days.What's more, when he's in one world, the time in the other one is actually frozen.