The world of Fairy Tail is populated by humans and numerous other races, including Exceeds, dragons, celestial spirits, and giant beasts.
In a land where there are a lot of demons. Sirens fear them for the king of the lands who is wanting to gain ultimate power has been getting his followers to capture sirens to use them to trap men's souls of his enemies. Only few haven't been caught.
Kerthia has been over run by bloodshed, war causing fear in the races hearts. Vampires and Demons battling for power. Hero's and Heroine's are being called to action to help.