The Sacred Ruins - Chapter 497: Devastatingly Beautiful

When a glorious old civilization was toppled overnight, a strange purple moon rose and thus began the Purple Moon Era.

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.

I found myself lost in a different world, the characters I once read about in web novels were in front of me, harassing me, ruining my damn day. Also, a shitty system that asks you to do strange quests. But you know, the only good thing about all this: I have a beautiful face, it's nice to look in the mirror... ha, ha... I'm going crazy! How the hell am I going to survive in this damn world?tring![System Notification]- [Mission]*Participate in the NOVA Academy entrance exam[Compensation: ??][Failure: System loss]

Civilization is destroyed and records lost. Only Dudian survives in a cryogenic sleep. Three hundred years later, Dudian wakes up and must become Dean to survive. Who can he trust in this world overrun by monsters without and within?

- Description from Novelupdates