Title: Demon Sacred, Demon Seiten, デーモン聖典, Thánh Điển Quái Vật
Author: Itsuki Natsumi
Genre: Comedy Drama Fantasy Romance Sci-fi Shoujo Supernatural
Length: 11 Volumes (Complete)
A symptom which causes one to physically regress till the point of disappearance. A pharmaceutical company which claims to be researching a cure and the cause for this syndrome. What are their motives? And what does a dragon slayer and even a handful of demons have in relation to all this?