Once upon a time, two different races ruled the world: Humans and Monsters. War broke out between them. At the end humans were victorious. They sealed the monsters underground with the powerful spell.
Soon enough, humans' greed for more power became another war between them.
However, less than four decades later, a tiny human child fell underground. They died from fall.
And that alone broke the barrier.
After that, monster race came back into the Surface again and then this second war ended up quickly. Everyone lived in peace. Happily ever after.
Yet, that isn't true.
Even after 15 years, somewhere from people eyes the war continued.
Between mobsters and another mafia gangs...
And between humans and monsters.
It hasn't ended.
Every human and monster in their heart knew that.