Momochi-san Chi no Ayakashi Ouji  

The Demon Prince of Momochi House, 百千さん家のあやかし王子, Принц аякаси из дома Момоти

On her 16th birthday, Himari Momochi receives a letter stating that she has inherited a mansion called the "Momochi House." Although raised in an orphanage, this mansion is all she has left of her real family. Despite rumors about its haunting, Himari ignores them and enters the house to meet Aoi Nanamori and his companions Ise and Yukari, who seem to be squatting there. They warn her to leave but Himari vows to make them go instead. However, she soon finds herself being attacked by youkai and learns that the Momochi House sits in a space between the world of the living and the spirit realm. Even more surprising, Aoi was chosen to be its guardian, originally meant for Himari. But this great power came with an awful price: Aoi can never leave the mansion and his existence in the human world has been erased. Despite his pleas for her to leave the house, Himari promises to help him break the curse as she now lives under the same roof as him.