After the death of her parents, Himari Momochi has inherited a supposedly abandoned and haunted mansion called Momochi House. However, upon arriving at her new property, she finds what she assumes to be three male squatters – Aoi Nanamori, Ise, and Yukari. Soon discovering that these are in fact yokai, Himari refuses to leave despite their warnings, choosing to remain despite the dangerous other supernatural forces residing nearby.