Hundred years ago, humans were fighting the monsters in order to survive their rule. But now their fight have become "hunt". After the humans found the use of the monsters in medicine, clothing, jewels and many more items crafted from them, the monsters have become commodity. The hunting monsters became an alluring way to make millions and soon everyone was captivated in. And in the 800th year of the humans, all countries within the empire united and expanded the hunting grounds across the entire world, opening the curtain upon the great monster hunting era.