When Freshman Zhou Xiaoan put on a ring of unclear origin, a terrifying devil leaps from his mouth and his life is changed forever. Shocking historical secrets are slowly revealed - a Blood Devil calling itself King Zhou of Shang, a race of heart-eating zombies; a dubious group of Taoist Priests that fight against them; mysterious beings of the supernatural world who can blend in to human society.
— Description from AniList community (anilist.co).
