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.
The Gluttonous Feeder Ring... 
The Gluttonous Feeder Ring...
...الخاتم الشّره... الخاتم الشّره
Der Ring des abartigen Fressens …
Der Ring des abartigen Fressens …
Anillo Voraz… Anillo Voraz…
Anillo Voraz… Anillo Voraz…
La bague gloutonne…
Anello Divoratore... Anello Divoratore...
Anel Glutão... Anel Glutão...
Кольцо «Пожиратель»…
Кольцо «Пожиратель»…