House of Lamentation

Located in the Devildom, The House of Lamentation is a huge mansion where the seven demon brothers Lucifer, Mammon, Leviathan, Satan, Asmodeus, Beelzebub and Belphegor live. After the beginning of the Exchange Program, the main character lives with them. They all have individual rooms, save for Beelzebub and Belphegor who share a room.