Ana arcanghel is the last of her kind after a ruthless demon king swiftly and cunningly attacked Primaria's castle with an almost infinite number of demon armadas. However, after stumbling upon a curious witch she found herself trading her wings for her own survival. After that one fateful trade, she is found deep within the heart of Nulliama's forest filled with strange creatures, Ten years after, she is still trying to forget the wounds of that day that are trying to heal. Yet, upon a stormy knight emits a knock from the rickety old cottage where she lives and finds a man bleeding; on the verge of death