Stepmother: I Am Asked To Give A Kidney To My Half-Brother - Chapter 20

In the tenth year after the new era, the world finally came to an end. Zhang Mu truefully waited for his death, but unexpectedly found that he had returned to ten years ago. With his memory about the future, he swore that he would change the calamitous history, saving the earth from being destroyed! Walking dead, zergs, evolvers, and various mutated animals… nothing can stop him! The first step is to retrieve his identity as an era merchant , then find all the treasures he can remember to enhance himself!

- Description from Novelupdates

Li Yu transmigrated to a world of the cultivation and martial arts. He became the head disciple of a low-ranking sect.

Professor Kang lived the same day on repeat - same lectures, same coffee, same quiet evenings.Unremarkable in every way.That is, until the day he died trying to save a student.When he opened his eyes again, he wasn't in a hospital. He wasn't even human anymore.Reborn as the weakest of monsters - a slime - in a world where the strong devour the weak, survival is the only law that matters. But if clawing his way up means becoming the apex predator himself... well, so be it.

It all began with a poor orphan who would work every day for long hours to pay for his Aunt's medical bills.When his life begins to fall apart and he is homeless sleeping in an alleyway he hears a robotic voice.{Do you wish to integrate with the Dungeon System}“Yes” he answers, without much to lose.And from then his life had never been the same.He was taken into a dungeon each night to hunt and he began to realise just how little he really knew about the world that was much wider than he thought.