In this world where monsters are rampant, there is a group of people who are neither accepted by humans nor recognized by monsters. People call them half-demon.
Yakko is a half-demon who is half human and half cat.
In order to save Yezi, Xueer forcibly awakened the ability of the divine beast in her body, causing her spiritual energy to dissipate and her life was short-lived.
Yezi went through many difficulties and dangers, vowing to help Xueer recover her lost spiritual energy.
Concept: Seemingly black but not black, seeming white but not white, can we only live in the gray area?