System Came When the Doctor was Thirty - Chapter 13: Business Expansion!

What happens when you survive seven hellish years on an alien planet in the ultimate battle of the strongest in the universe—as a human?What happens when you give everything you have and more to defeat the final boss in a battle to the death… only to wake up the next second, back at day one?Going through it all over again?But something is wrong.The game in his hands isn’t Nyxfall 6: Dark End, the world he spent over seven years surviving. It’s Nyxfall 7: The Veilbreakers—the next installment.He won? So now he’s been given another game to play?And he’s not alone. There are others like him in every alien civilization. This time, it’s not just survival—it’s about who can lead their people best.That is… if they even care about their people at all.Why bother leading at all? With everything they have learned, why not exploit the system, amass unimaginable wealth, and live like a king in a game that pays in real money?

After the nuclear warfare, massacres started to spread throughout the entire world. The order between humans completely collapses, and the strong eats while the weak gets eaten becomes the #1 rule.

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?

Xiao Ze, who was dedicated to the people and vowed to become a generation of Ming Jun, accidentally fell on a little lady.
The little lady was born beautiful and lovable.
So Xiao Ze accepted his life and got the name of fear.

ps:
①The male protagonist has no concubine, and he is dedicated to serving the country.

- Description from novelbuddy