In This Life, The Greatest Star In The Universe - Chapter 181:

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.

Pei Shiyi, who had been dead for hundreds of years, was suddenly resurrected. He was poor, homeless and was an unregistered resident. In order to settle down, Pei Shiyi took over a cat cafe.

The cat cafe was poorly managed and on the verge of closing down, there were only two to three real kittens.

Pei Shiyi fed the kittens and set a small goal for himself: for example, first, become the best cat cafe in this city. So a year later, a cat cafe called Xian Chan rose to prominence.

The Jin Hua cat that practiced Daoism for hundreds of years became a fat orange cat.

The Bi An came here and became a golden British shorthair.

The lively and active leopard cat was a real leopard.

It also came with a fluff-obsessed, non-human Director of Administration. After sniffing* the fat orange cat, the leopard cat and the ragdoll, he even began sniffing* Pei Shiyi.

The fluffy Pei Shiyi, who was a real phoenix: Do you want to die?

Director Bao: Sniffing cats is fun, sniffing you is addictive.

- Description from Novelupdates

The system asked: “What happened to the slag man?”
Bei Yu Tang answered: “Destroyed.”
The system asked again: “What happened to the boss?”
Bei Yu Tang immediately ran away!
Whether abuse of slag male or white lotus, she, Bei Yu Tang is very skilled.
But regarding abusing the boss, forget it!
Big BOSS’s fighting power is too strong, for small shrimp like her, it is still the best policy.
She did not want to destroy the boss, but was destroyed by the boss.
BOSS lord: “Wife, who do you want to destroy, let your husband do it.”
Bei Yu Tang excitedly replied: “System monarch.”
System: (face filled with tears and dead … …)
[Story of pampering, 1v1, Straightforward story, Easy and humorous]

- Description from 69shu translation

The worst student of Westroad Academy. The disgrace of the Blake House. A new soul enters the body of Frey Blake, who couldn’t overcome his miserable life and chose death instead. “What’s with this body? I’ll have to work on tuning it from scratch.” The Great Mage Lucas Traumen, with the body of Frey Blake, gains a chance at revenge!