My interracial harem of beautiful queens - Chapter 1 Reincarnation...

“Guokuo, Guoguo, ci… ciguo cake, fragrant…”

“Brother, after Qiu’er finishes eating this delicious, golden pancake fruit, can you tell Qiu’er another story?”

“Brother, Xia’er has signed up for the singing competition, will you teach Xia’er a song?”

“Brother, can you dance folk dances? Chun’er wants to learn…”

Zhuang Zhou dreamed of a butterfly, and the butterfly waved its wings gently, changing the wheel of life in suffering, and also changing the sky of Shengyu.

- Description from novelbuddy

In a world where its inhabitants can destroy a city wall single-handedly, the empress has a kirin as her pet, and the imperial palace of Great Xia has a pool containing a dragon. There is also a Sword Mountain where spirit swords occasionally leave in search of a master .

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.