Obey Me! Replaced AU

They are seven brothers:
Lucifer: the first born, the first eldest brother and the Avatar of Pride
Mammon: the second born, the second eldest and the Avatar of Greed
Leviathan: the third born, the third eldest and the Avatar of Envy
Satan: the fourth born, the fourth eldest and the Avatar of Wrath
Asmodeuse: the fifth born, the fifth eldest and the Avatar of Lust
Beelzebub: the 6th born, the 6th eldest and the Avatar of Gluttony
Belphegor: the 7th born, the youngest among the brothers and the Avatar of Sloth, Beelzebub's twin

Diavolo: the future demon king of Devildom.
Barbatos: the demon butler of Diavolo.
Simeon: a angel and he came to Devildom as a exchange student.
Luke: a young, little angel that came to the Devildom as and exchange student with Simeon
Solomon: an immortal sorcerer that came from the human world to Devildom as an exchange student