The romantic comedy follows a mistress and her "servant" (bodyguard) in Maison de Ayakashi, a high-class building better known by the name "Demon House (Ayakashi-kan)." Rumors about it abound, ranging from "nothing but weirdos live there," to "It's a haunted house inside," but the truth is that the people who live in this mysterious building are all descendants of demons.
Ririchiyo Shirakiin is troubled by her inability to interact with people, and comes to the building in order to change herself. There she meets Soushi Miketsukami, one of the Secret Service bodyguards assigned to each tenant, and he tells her, "Please make me your dog!"
source: AnimeNation