Chapter 0
To live in a world like this you should know the truth of its past and current day, it's one plaged with monsters, Angels, Devils, Demons, and all of what you can think!
The war of the Demons and God's plunged this world in to chaos, death was everywhere and there wasn't much resources for the lower races, as the gods took it all for themselves and the Demons who escaped from deep in the abyss focused all their concern for conquering all for their leaders, their three Demon Kings.
Amongst the Demon race, there was a special race that stayed out of their wars own wars, and that was mainly because they liked the taste of blood. . .Well, it is sort of true but not entirely, they just found this war too boring so they stayed out of it. The Incubus/Succubus race is more of "I'm hungry, let's just have sex" than the typical Demon being like, "I'm hungry, let's go tear something apart and eat away at it's flesh and bones!!!" this race just didn't find it interesting, plus they already had to assist in the current Blood War of the abyss, and they were also going over a civil war amongst their own race, so they had another big reason to stay out of this war.
Back to the main topic, the gods revealed their ace's and the war ended after a few hundred years, it was a long battle and the Demon race that wasn't sealed away in the abyss, were already nearly extinct out here.
The Newborn Demon race was becoming extinct.
.
.
.
Yet this also went for the gods. After the war the last of them vanished never to be seen again, leaving behind da Angels who didn't know what happened to their Devines.
Some would say they just got bored and chose to live amongst the humans, while others would say they had reached enlightenment by ending the evil race, and left to a higher existence. . .In the end no one knew though.
With both the heavens and underworld left in shambles along with the 5th Devine realm, there were new beings that wanted so bad to take over, and take rule.
Rumor of the aftermath went like:
Devil's took over the underworld, the once lowly beings that resembled humans and used to serve the Demon's as slaves now ruled over most of the underworld/hell.
The Angels took over heaven and with their arch-angels, they ruled with a iron fist, the heavens desided to spead their ways to the humans and that's where we have the overworld. Which is the realm they all live on now.