The Royal Academy of Diavolo (RAD) boasts a student council like no other, led by the powerful demons Lucifer, Mammon, Leviathan, Satan, Asmodeus, Beelzebub, and Belphegor. Despite embodying the seven deadly sins, their outrageous behaviors define their roles. Beneath their fearsome exteriors lie endearing and comical personalities, revealing a more whimsical side to these infamous figures.