Plot:
"Our protagonist, Utoko Yatsuse, is a high-class girl living comfortably in Taishou era until one day she's witness of a murder and discovers that "demons" exist.
Because of her being present during the murder, one demon attacks Uroko; but she's saved by a man that calls himself Kukimu. After the incident, Uroko decides to investigate about demons to know more about the murder she saw. Thus, she enrolls into the high school Kukimu works in..."