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.
But you remember things that 
happened after I reached Bet rank.
.لكنّك تذكر الأشياء الّتي حدثت بعد أن صرت في الرّتبة بيت
Aber an das, nachdem ich zum
Rang Bet aufgestiegen bin, …
pero sí lo que pasó
tras ascender a Bet,
pero sí lo que pasó
tras ascender a Bet,
Mais après mon passage
au rang Beth,
Ma ricordi cosa è successo dopo che sono salito a Bet.
Tem
consciência
но знаешь о Кирио и фейерверках —
а это всё случилось, когда я был третьего ранга.