Suzuna Kuraki is enraged by Koichi Hayama, yet she is forced to accept him as the future head of the Kuraki family during the Expecting Moon Ceremony. As Hayama arrives at the estate, he uses his manipulative charm to stir conflict and seduce those around him, including the resistant Suzuna. Amidst supernatural omens and psychological games, Hayama begins to assert a dominant and dark influence over the maiden of the house.