After Getting Engaged To Mr. Shen - Chapter 800: The Skill of the Great Demon King (1)

Transmigrating into a poor and mistreated young lady's body, what will the craziest alchemist of the seven realms now do?

The human race is fending off the assault of the thaids, strange monsters evolved by animals occupying most of the earth's surface.

Because of the monsters, society has evolved into one based on individual fighting prowess; Erik is an abandoned young boy living in such society with the most useless of the powers.

Everything changes when his father returns home, bringing something he would have never expected.

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Introduction: [Warmly heals the daily text, don’t enter if you don’t like it] In the terrifying world of demons, demons, and ghosts, countless human players are carefully living, but Mu’an plays the daily strategy game with the favorability system. “You spent ten…

- 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.