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.
He's able to use magic thanks 
to Sullivan's magical powers
إنّه يستطيع استخدام السّحر بفضل قوى ساليفان السّحريّة
Er kann diese Magie durch
die dämonische Kraft seines Großvaters
Puede hacerlo
gracias al poder de Sullivan
Puede hacerlo
gracias al poder de Sullivan
Il fait illusion
grâce à la magie de Sullivan
È in grado di farlo 
grazie ai poteri magici di Sullivan
Ele é capaz de usar magia graças
aos poderes mágicos do Sullivan
А получилось у него
 благодаря магии Салливана