The Realm of Abyssborne

It is believed that in this existing universe, there are only two types of world, the Human World and the Abyss. Humans usually named the Abyss as Hell, where they believed if they died with a bad reputation, they'll be sent out down the Hell along with the demons. However, it is not what Abyss is. Abyss is indeed the home of demons, but not just demons, all kind of none human creature such as vampires, werewolves, mermaids, mermans, witches, wizards, etc. They are much more powerful than humans, that might be the reason why they live in Abyss and not in the planet of humans, the Earth. The Abyss is dominated by Emperors of each kingdoms. They didn't know that human world exist or else all these greedy kingdoms will try to invade and torment the weak homo sapiens.