In the world of Remnant, creatures of darkness known as the Grimms have been a threat for many generations where there are people known as huntsmen and huntresses who fight the Grimms. But the real threat is themselves. Some humans would treat them poorly, others treat them equal. A man name YN is one of them, doing everything he can to help many from the Grimms to a promise he made with his childhood friend who thought to be dead until one unexpected day, he ran into her who is a white fang.