Brothers Lucifer, Mammon, Leviathan, Satan, Asmodeus, Beelzebub, and Belphegor are among the most powerful demons in the Devildom, serving as officers on the student council at the Royal Academy of Diavolo (RAD). However, being avatars of the seven deadly sins, their behaviors often tend toward the extreme. Their everyday antics belie their high status and fearsome reputations among others of their kind. When viewed behind the scenes, the members of this family are more lovable—and laughable—than they first seem!

The CG anime centers around the extracurricular activities of students. (Source: AniDB)

Kyousuke Ishihara is an average high school student residing in Tokyo. Recently, his younger sister, Namika, has moved back home after living in Osaka for 10 years. As Kyousuke tries to understand his sister's peculiar behavior and dialect, the two bond over their differences and the difficulties that come with change.

Direct continuation of the previous season. Full CG series about 3 fairies who ramble over random subjects in 3 locations.