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!
Oh, that was just to celebrate
me getting my first grandson!
!ذلك كان احتفالي بحصولي على حفيد فحسب
Das mache ich, weil du mein erster Enkel bist!
Eso fue para celebrar
que te volviste mi nietecito.
Eso era para celebrar
que te volviste mi nietecito.
C’était pour célébrer
ton entrée dans la famille.
Oh, quello era per festeggiare il mio primo nipote!
Ah, mas era só pra comemorar
ter meu primeiro neto!
Ну, то было в честь
 моего первого внучка!