Immortal Fairies Always Have Designs on Me - Chapter 21 - 14 Husband, do you want to ease my longing before you leave?_1

As the era of dragons gradually came to an end, as arcane masters left countless riches and legends under the starry sky, one awakened youngster after another began to set foot on their journey.

[Shelter System successfully bound to host!][Option One: City of Light, save the survivors in the apocalypse and become a glorious and benevolent savior.][Option Two: City of Darkness, humans who enter the City of Darkness can only become your slaves. And you, will be the devil ruling over the apocalypse.]Sorry, I am no saint, I choose City of Darkness! From today onwards, I will be a villain!

Xu Jin simply bowed a few times in front of the nine star lanterns and came to this world that could guide the starlight into his body. Then, he bowed again in front of the nine star lanterns...

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.