Becoming An Ancestor In Another World From This Day On - Chapter 325 - Companion Realm Treasure,

In the cyberpunk era, corporate alliances dominated the world, and both the humans and witches were ens*aved by advanced technology, becoming nothing more than fuel for society. Unwilling to become a company dog, Xu Yang decided to run away, while saving the cute and powerful witches from the giant enterprises, together they embarked on a road of innovation!

- Description from Novelupdates

Lee Se-Hoon, the blacksmith of humanity’s last desperate united force, fought against the demons until the very end. However, the result was mutual destruction, with the world coming to an end. The moment he took his own life over that futile conclusion—

“…What is this?”

He had regressed to his days as a candidate at the hero training institution, Babel Academy. Having obtained a second chance, he swore to use anything as material to gain victory this time. Anything at all!

God gave me one more chance and finally came back after four hundred years.

As soon as I realized I returned, I decided that ‘no one should have pride.’

My goal was to destroy the country. So, I grew up with a genius prince who lived in hiding before returning.
He took up the empire for me and I left him for him to achieve his goal.

‘I came to pick you up Charlize Ronan.’ Dylan, who became a perfect tyrant after a few years, found me after searching all over the continent.

‘Why did you flee and run away?’