The Heart of the Sky Demon
Editor: EndlessFantasy Translation
Back during the Ancient Zenith Civilization, humanity had developed into an extremely prosperous period. They had invaded other dimensions, and one of them was called the Demon Realm. This realm was different from other realms. It had no spirit energy and was instead filled with demonic energy.
And this realm was occupied by demons of every kind. The most famous of them all were the sky demons. They were the representative of all demonkind.
When the Demon Realm was discovered, a long war between humans and demons began. Both sides became entangled, and the existence of demons became present through the entire history of mankind ever since.
The roots of the demonic path that was now popular came from the demons. There were differences between the humans and demons. Some people could not resist the enticement of the demons and willingly degenerated into pawns, becoming something known as human-demons.