My Servant Is An Elf Knight From Another World - Chapter 15

An alien spaceship invaded and unleashed terrifying monsters on Earth. The enigmatic invaders gave humans a chance to fight back with a system and classes, but John is stuck with the NTR Rogue class.Now John's only way of getting stronger is by completing tasks related to stealing other men's women. John's life had been a cruel joke, and this new apocalyptic world might just be what he needed.----This is a “netori” story where John, the main character, steals women from others. There is no NTR towards John.Check the Discord server for illustrations: The link is at the bottom of the first chapter. Removed from here because of bots.

At first, when he learned that he was forced to go to many different routine worlds and be reborn into all kinds of cannon fodder, he was against it.

Li Mo, who has studied antiques and miscellaneous studies since childhood, had a mutated eye in an accident.

Unsophisticated and generous bronzes, exquisite porcelain, calligraphy and paintings with horizontal brush and ink, and thrilling gambling stones came one after another. Since then, Li Mo’s life has undergone subversive changes.

I have divine pupils, and there is no treasure in the world.

- Description from novelbuddy

The world was once at war with 10 alternate worlds. This was known as the Concept War and our world won 60 years ago. All of this was concealed so no normal people are aware of this fact in the current time.

After the death of his grandfather, the high-school student Sayama Mikoto is suddenly summoned by the giant corporation IAI. He learns this world is headed for destruction due to the acceleration of the Minus Concepts. To prevent this, negotiations must be undertaken with the survivors of the other parallel worlds so their 10 concepts can be released.

And so Sayama is caught up in the final battle to clean up after the Concept War which left behind so much enmity.