Suzuki Iruma is too nice and just doesn’t know how to say no. One day, he somehow gets dragged into the netherworld where the demons live. He arrives at the great demon Sullivan’s mansion where he is asked to do the unthinkable... and ends up becoming Sullivan’s grandson! He is quickly enrolled into the Demon School Babyls where Sullivan serves as chair-demon. Iruma begins his super exciting school life at demon school while trying to conceal the fact that he’s a human!
I will immediately expel
any failures, so be warned.
.سأطرد أيّ فاشلين على الفور، لذا ها قد أعلمتكم
Wenn ihr euch danebenbenehmt,
dann fliegt er sofort von der Schule. So ist der Plan.
Expulsaré a cualquiera que fracase.
Quedan advertidos desde ya.
Expulsaré a cualquiera que fracase.
Quedáis advertidos desde ya.
D’ailleurs, si vous échouez,
vous serez immédiatement chassés.
Espellerò personalmente 
tutti i falliti, siete avvertiti.
Eu imediatamente removerei
qualquer fracassado, estejam avisados.
За любую ошибку последует
немедленное исключение — имейте в виду.