Shinwa Densetsu no Eiyuu no Isekaitan - Volume 6, Chapter 4 – A World That Begins To Creak, Part 5

Lin Yu crossed into the world of the Demon Slayer and started the mode of rewarding hard work.

Each physical training can bring the increase of its own attributes, and there is no limit to the superposition.

The flesh is sanctified, and the power is supreme.

Fallen Ji looked in fear at the tall man in front of him, whose body was covered in shadows. The machete-like Japanese sword behind the man was bigger than her entire body, and her neck was being stabbed to death by a strong arm. ‘s grasp.

“Unarmed… catch a ghost?”

Yi Wozu couldn’t remember how many times his wounds had healed in the fierce battle, and the corners of his bloodshot eyes were fierce and excited.

“A mere human can actually reach this level, are you a monster?

bring it on!

I would like to call you the strongest. ”

Ghost Dance? Wu Miserable: Trembling…

- Description from novelbuddy

'Confucius spoke not of the bizarre, the valiant, the rebellious, nor of spirits and demons.'This is the story of Mok Gyeongwoon, AKA the First Heavenly Demon - Cheon Ma, the forefather of the main character of the popular novel and manwha Nano Machine. This story is the prequel to Nano Machine, taking place 800 years earlier.

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.