Ririchiyo Shirakiin is the sheltered daughter of a prominent family. Due to her petite stature and wealthy background, Ririchiyo has lived as a protected and dependent girl her entire life, but she has now decided to change that. However, there is just one problem—the young girl possesses a sharp tongue she cannot control and terrible communication skills. With some assistance from a childhood friend, Ririchiyo moves into Maison de Ayakashi, a secluded high-security apartment complex that, as the unsociable 15-year-old soon discovers, houses a host of bizarre individuals. Furthermore, their quirky personalities are not the strangest aspects of them: each inhabitant of the Maison de Ayakashi, including Ririchiyo, is actually half-human, half-youkai. But Ririchiyo's troubles have only just begun. As a requirement for staying in her new home, she must be accompanied by a Secret Service agent. Ririchiyo's new partner, Soushi Miketsukami, is handsome and quiet... but ridiculously clingy and creepily submissive. With Soushi, her new supernatural neighbors, and the start of high school, Ririchiyo definitely seems to have a difficult path ahead of her.