This world is full of mysteries. Creatures that people thought weren't real were actually real. Some harm humans, some don't. From there, Stellerian was formed.

Stellerian, a secret organization that contains humans to hunt down mystical creatures that harm humans, called hunters.

Some hunters have special abilities in the form of 'energy'. Something like soul power that can produce a power, such as teleportation, telekinesis, making weapons, etc. A hunter usually has 1-2 energy abilities.