Prologue
A long time ago, in a place far, far away, there was a war going on between werewolves, vampires, wizards, and beast men. All of them fought fiercely to claim the land for themselves, but none of them succeeded because the demon clan arrived and quickly won the conflict.
Ultimately, the demon king claimed the destroyed territory and built his own kingdom. The only option left to the werewolves, vampires, wizards, and beast men after the war was to live on the outskirts of the demon king's kingdom.
The demon king requested their appearance one day.
The demon king began, "I've called you here to tell you something."
The tension was high because the werewolves, vampires, wizards, and beast men were still at odds with one another. Despite his words, none of them took him seriously and continued to glare at one another.
Somehow, the words "The humans and angels just teamed up" caught everyone's attention.
Rolling his eyes, the vampire king asked, "And what's that got to do with us?" realizing that the statement meant nothing to them.
"Why don't we team up too?" The demon king said, earning confused looks.
With unbelievable intensity, they all gazed at the demon king, who merely smiled at them.
"Are you crazy? Have you forgotten about the full-blown war that happened between us? And now you want us to team up?" the ruler of beast men questioned, casting a perplexed glance at the demon king.
The demon king replied, "I long know that I am crazy."
The vampire king rolled his eyes and remarked, "There is no way I would team up with those dirty mutts."
The werewolves responded, "We would not team up with you too, you mosquitoes!"
The wizard lord inquired, "Can we be the only ones to team up with you, demon king?"
The wizards thought they could use this to escape their difficult lives because they were sick of living in the slums, but they also didn't want to team up with them, still having bad blood against all of them.
All of them fought against each other in front of the demon king, insults were thrown left and right, until the demon king had enough with all the noise.
"Enough!" The demon king's throne room shook because of the volume of his voice, and as a result, the room became silent and everyone was terrified by his booming voice.
"Thank you for listening, I'm sure all of you know that I have pre-cognition ability, and I saw something I could not accept." The demon king started his reasoning on why he wanted to team up.
The demon king replied, confusing everyone in the chamber, "From what I saw, we are gone and all that's left are the humans."
The ruler of the beast men was confused as to why they had vanished from the demon king's precognition talent and asked numerous questions. "What? How is that possible, demon king? We are stronger than those weaklings. How could they be the only ones left in your vision?"
"As I previously mentioned, humans and angels formed an alliance, and since humanity began to worship the god, who is the leader of the angelic race, the god assigned humans a guardian angel to assist them. We ultimately perished as a result of our inability to resist them." The demon king clarified.
All the kings and leaders of every species were incensed by this.
The vampire king remarked, disregarding his former views on werewolves, "I agree, let's have an alliance."
Disregarding the insults from earlier, the werewolves exclaimed, "Yeah! Let's show them no mercy!"
The beast men cried out, "Yeah! Let's show them that being with those angels will not be the way to annihilate us."
The wizards grinned evilly and added, "Well, I'm glad we're all on the same page."
A common trait among this species is their arrogance; they have made a name for themselves as the world's strongest group, and they refuse to accept that mere humans are the cause of their race's demise, especially since they are all more powerful than humans.
The demon king said, "Well, since we're all in agreement, shall we begin constructing your homes and an army?"
They all exclaimed, "Yeah, let's go!"
Ultimately, they banded together, strove to establish their kingdom as the most powerful in the world, and taught their children to murder every human they came across. They then send their children onto the battlefield at the appropriate age to destroy both angels and humans in order to preserve their lineage.
In conclusion, they were successful, humans and angels vanished, and everyone is now content with their lives.
Up until a negative event occurred...
"The humans... are back."