I'm Not the Heroine - Chapter 13

As a promise, he went out into the world as an assassin. 3 years later, after becoming the Supreme Assassin, he gave up on everything he had and returned to the ranks of ordinary people. But one day, Kismet, a mystical game created by the National Research and Development had appeared.

[Regressed successfully!]Zick lifted his eyelids, revealing two dull eyes. A grand room filled with medical appliances was reflected on his pupil.The piercing pain originating from the abdomen made Zick slowly accept the reality.He had returned 10 years back in the past!The very moment from when Zick began to lose everything.[Destiny system has been activated. Get closer to people with strong destiny and strengthen your own destiny!][Sub-function: shall be unlocked soon!]After taking a look at the interface, Zick closed his eyes.“First…I should repay that chick for this wonderful gift.” Zick looked at the bandages on his waist.......{Additional tags: Age regression, Evil protagonist, cold female leads, Academy, evil organizations, conquering, war.}

“Shameless Xia Ping, not only did you steal my martial arts manual and medicinal pills, you even took my fiancée! We’re not finished!”

Through a mysterious portal, Chen Jin arrived at this strange place – a post-apocalyptic world where civilization had been destroyed.

Consequently, he found –

A piece of metal scrap
A robot trash collector
A battleground
A city
A ton and more of gold
A copy of high-tech documents
A…
In short, Chen Jin found a planet.

- Description from Novelupdates