My Players Are So Fierce - Chapter 14:

After dying, Chen Heng finds that he has transmigrated to an alternate reality: everything is the same, except the world is now a Wuxia world heavily influenced by martial arts! Not only this, he discovers that he has a Fantasy Simulator, from which he obtains rewards that make him incredibly powerful in his new reality as well. Martial arts, immortal cultivation, and overpowered abilities–all of this begins from a single simulation!

Read the first six chapters, and you won’t be able to stop.Elliot Crown was just an ordinary teenager......boring life, average grades, nothing special. But one day, he unlocked a terrifying ability: he could hear people’s thoughts… but only if he knew their name and age first.At first, he treated it as a game, exploiting secrets, manipulating people, and bending reality to his will.But then, the nightmare began.One night, he fell asleep in his world—only to wake up in another. No explanation. No way back. Just an unfamiliar world filled with danger.He tried using his ability, desperate for answers.And then… he died.But that wasn’t the end.He woke up again........in a different world. New body. New identity. Same fate.Over and over, the cycle continued. Sometimes a prince, sometimes a slave, a soldier, a sorcerer, a demon… but every time, he met the same cruel fate.Yet Elliot didn’t care. As long as he had his power, he would manipulate, deceive, and twist the world to his will. If the universe wanted to play games with him… then he would play to win.

Childhood sweethearts.
The most popular person in school is my childhood sweetheart.

- Description from Novelupdates

Traversing into another world, Zhang Xuan finds himself becoming an honorable teacher.

Along with his transcension, a mysterious library appears in his mind.

As long as it is something he has seen, regardless of whether it is a human or an object, a book on its weaknesses will be automatically compiled in the library.

Thus, he becomes formidable.

“Emperor Zhuoyang, why do you detest wearing your underwear so much? As an emperor, can’t you pay a little more attention to your image?”

“Fairy Linglong, you can always look for me if you find yourself unable to sleep at night. I am skilled in lullabies!”

“And you, Demon Lord Qiankun! Can you cut down on the garlic? Are you trying to kill me with that stench?”

This is an incredible story about teachers and students, grooming and guiding the greatest experts in the world!

- Description from Novelupdates