In addition to humans, there are four major species in this world: vampires, absolute angels, Kali zombies, and Yuman lynxes coexisting on this continent. Although they are rare in number and appear to be the same as humans on the surface, they all live on blood. So humans and the purebloods of the species formed the Yuanwei Pavilion to jointly maintain the peaceful coexistence of all species.
When he was 7 years old, a sudden accident caused Tsumugi to lose all his memories and he was adopted into Momomiya's family, where he met his 14-year-old brother Ling. However, fate was not gentle to her and she disappeared on her first day of high school. . . What's waiting for her?
Concept: The saddest thing is that he is by her side, but she has forgotten him.