Due to very bizarre circumstances, the human boy, Suzuki Iruma, ends up in the netherworld. He is keeping the fact that he is human a secret and attends the Demon School Babyls. Because he is human, he cannot use magic so he had been using the Gluttonous Feeder Ring to get by in school. But then one day, the ring started to speak! Why, though? Iruma then meets the incarnation of the ring who calls themselves Alicred, AKA Ali-san.
Iruma-sama, would you like 
to get the A lunch today?
إيروما-ساما، هل تودّ أن تحصل على غداء من درجة أ اليوم؟
Iruma-sama! Nehmen wir heute
das Gericht A oder das Gericht D?
Don Iruma, ¿hoy pedirá
el menú Demonio?
Don Iruma, ¿hoy pedirá
el menú Demonio?
Maître Iruma, on prend le menu A ?
Grande Iruma, oggi vorresti il pranzo A?
Iruma-sama, você
gostaria de um almoço E?
Ирума, сегодня вы предпочтёте
«А»-ланч?