Lust Knight - Chapter 662 Very Easy And Very Difficult But Both Problematic

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!

Lyra Shedd faced a brutal betrayal—her grandfather violently stole her superpower and handed it to her nemesis; her beloved younger brother, in his stupidity, leaked their only hidden assets to her enemies.Once a genius, she was reduced to nothing, drifting in the sea of stars.During her most agonizing years, she finally accepted the fact that her family didn't love her. Realizing she had nothing left to lose, she decided to throw off all moral restraints and become a villain!On her journey of revenge, she encountered many handsome men—but to a cold-blooded villain, they were nothing but tools for her vengeance!This time, she would make all those who pushed her to the brink tremble and scream for mercy!

Doomsday comes, and human beings enter the heavenly world.
Ten years later, Yang Chen, who was betrayed tragically, returned strongly with the Tianyu bug. In this life, he vowed to make the betrayal pay the price. He has a powerful bug bonus, just like an open hang. Frightened to hear…

- Description from novelbuddy

A young man with an extraordinary mind is off on an exciting adventure when he mysteriously wakes up in the body of a feeble slave-guy in a different, rich in quirks world.

The main character, a selfish jerk, would use extreme means to achieve his goals. However, he never allows his base instincts to overrule his sense of decency. He always pays back both good and bad deeds.

Will his (terrible/excellent) mentality help him make a fresh start? Will he get through misfortunes and hardships of the new world?