Monstrous beasts invade, forbidden zones spread beyond the cities, and the Awakened become the final line of defense guarding humanity's borders.
Eighteen-year-old Shen Zhao was recognized throughout his school as the best in actual combat. But when he awakened, all he received was a black ancient book with no trace of power. He was classified as an unknown support type with no combat ability.
Only after he personally kills his first monstrous beast does the book finally open.
Any beast he kills can be entered into the bestiary and turned into a demon spirit that obeys him absolutely. Each time one is recorded, some of its power is permanently returned to him.
While others are still risking their lives for a single powerful beast, countless demons already bow behind Shen Zhao, with demon generals forming an army.