I can return to the age of mysterious - Chapter 90 - 0 Ending_1

Once upon a time, a hero had been summoned to a different world in order to defeat the demon king. After the war stretching 3 years ended the commendable hero slew the demon king. And he was forcibly deported back to earth after being dismissed.

Such bullshit!

Elves in addition to beast race, dwarfs and demon race. Even though I wanted to make a harem in the different world I saved! My dream will not come true on earth, where there is no magic at all. Thus, the hero returns on his own. Without the blunder of being extradited to earth this time, he will build a harem of his own in a different world.

This is a world where science and magic coexist.

Some people here seek powerful magic, and some seek eternal truth.

A science tyrant who came from another world, started as a little librarian, with magic in his left hand and truth in his right, kicking the door of the new century with one kick.

Some people call him the forerunner of magic, some say he is the founder of science.

Some people describe him that way.

In the new century, Blair is a symbol of evil.

- Description from novelbuddy

A few hundred years ago, Earth was affected by a mysterious force from the depths of the universe, triggering the revival of spiritual energy. However, things didn’t turn out as wonderful as humanity had imagined. The spiritual energy carried a strange power that caused the corpses of all living things to rise again, transforming into ghouls. And above these ghouls, even more terrifying beings existed…There were no ancient methods of cultivating immortality, nor any legendary awakenings of supernatural powers. But within the spiritual energy, there was also a presence of ghostly energy. This led to the emergence of Runes.Some people bore mountain runes, enabling them to move mountains and overturn seas, suppressing chaos. Others carried river runes, allowing them to reverse the flow of mighty rivers with a mere gesture. However, this process required a special profession to assist these rune cultivators—to constantly modify and engrave their runes, making them more refined and perfect.This profession came to be known as Rune Engraving.

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?