The Gremory Enterprise's hold on Kuoh Town in the human world is represented by a single estate. It functions as a multi-platform office, as well as a large-scale hotel complex. The size of the building itself is so massive that a full mansion sits atop the skyscraper in the middle of Kuoh, as well as a guest house, zen garden and multiple pools both inside and outside the mansion. The top ten floors all count as basements for the mansion above, and contain various training facilities and other such additions. While most of the building has existed for years, the upper half was added only by the Szavelneas Beelzebub by his and Sirtreize Lucifer's wish to push Eira Gremory and Yasukawa Takumi together by sealing them in a building until they managed to produce the desired results.