Regressor In A Strange World - Chapter 11: The Young Kid.

Humanity has been gradually transported to the Abyss by a bored god to compete against other races and monsters.The problem is… humanity failed. In a last desperate push the strongest survivors chose a comrade to travel as far as possible back in time.

Igor had asked him to die for the world. She would ask him to die for her. Problem was, he didn't really like dying, not for a second time, at least.

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

Damien Rothschild, an immortal who has lived life to the fullest for the past four hundred years, is visited by a mysterious woman who reveals the many depravities of his mischievous brother in another world.To save his brother, Damien must first travel to this other realm. However, the path becomes treacherous as he is tricked and loses everything he once had. Now, he must navigate this new world in search of his brother.This story follows a man who was granted the gift of immortality, allowing him to rise to the very pinnacle of the human race—until he was stripped of everything he held dear in a desperate attempt to save the only thing he ever truly loved.