One Piece: King of the World - Chapter 280: Times Have Changed!

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.

After choking to death on a watermelon, Rong Jiahui thought that she would enter the netherworld and be reincarnated.

But when she opened her eyes, she discovered, to her very horror, that she had returned twelve years into the past…

Looking at the beautiful and awkward “little brother” that would be conferred the title of Marshal in the future for outstanding military service, she almost let out a snort of laughter.

She firmly decided to hug the thigh of this little brother, and climb to the top of her life!

The plan was beautiful, but it had just one problem.

Why had this little brother… suddenly turned into…

A little sister…

- Description from Novelupdates

Another year of enlistment season, the recruit company is a rare encounter in a hundred years, bringing together a group of unruly thorns with sky-high backgrounds!

When everyone was at a loss, Qin Yuan recommended himself to be a recruit company commander and began to build the strongest special force!

In the annual large-scale military exercise, recruit companies are allowed to participate and are responsible for simple logistics.

However, when the red side was retreating, a miraculous scene appeared on the battlefield.

The head of a reconnaissance regiment of the Blue Army: “Report! The red team cheated! Our reinforcement regiment was defeated by the enemy’s special forces, but the enemy actually made a poor excuse to call himself a recruit company!”

Brigade commander of a rocket brigade of the Blue Army: “Can’t you afford to lose? Special forces are not allowed to participate in this exercise! Your red team actually dispatched special forces?”

The Blue Army’s superior roared angrily: “It’s just nonsense! I was shot in the head with special forces in violation of the rules? You also quibble that you are a recruit company?”

Qin Yuan smiled lightly: Don’t pretend, actually… I’m bringing special forces!

- Description from novelbuddy

There was a time when every living thing was decimated and the galaxy was forced to restart with a single thought from the evils.“Is the final boss my wife?” Xu Chang’an exclaimed as he looked at his wife who was making dinner and shook his head. “The system must have malfunctioned again.”Under the tree in his garden, Xu Chang’an wrapped his arm around his wife’s waist and said, “There is something I have to settle outside. I’ll be back soon.”“Okay. Stay safe.” After seeing the husband off, his wife raised her head to look at the leaves and said,“I think my husband is going to cheat on me soon. Should I… just restart this world?”