This story is about Kai Yuuki, who is suddenly and for reasons unknown, displaced from his home and friends and thrust into a world of beasts and monsters; Where Gods and demons wages war against one another.

By chance, he is placed in the world of Krei; an unfamiliar and hostile world, where dangerous creatures roam the lands and skies, and a gruesome war between the Sentient races and the monsters is currently raging.

How will Kai secure his survival on this war-torn world of magic?