The supernatural fantasy romance The Demon Prince of Momochi House continues several years later with Himari and Aoi living together in her new Momochi house. For a long time, Aoi Nanamori was trapped in Himari Momochi's ancestorial house as its spiritual guardian, the Omamori-sama. Now, several years later, Aoi has returned to Himari as a human, and the couple is living together' although strangely the two are now further apart in age... Aoi had always thought that he was chosen as the Nue by pure coincidence, but it turns out that his family has long had a connection to the Omamori-sama of Momochi House. When he discovers what has been preventing him from getting married to Himari, how will they deal with it?