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.
I finally got the hang of 
using an evil-lens camera!
!تمكّنتُ أخيرًا من استخدام كاميرا ذات عدسات شيطانيّة
Ich kenne mich jetzt so richtig mit
dämonischen Spiegelreflexkameras aus!
Ya domino bastante
las cámaras demorréflex.
Ya domino bastante
las cámaras demorréflex.
Je suis devenue une pro de la photo
avec les démons-relais !
Ho finalmente capito come usare 
una macchina fotografica con demonlente!
Eu finalmente aprendi a usar a
câmera de lentes demoníacas!
Я всё на свете узнала
про демоноаппарат!