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 never dreamed I'd become a demon's 
grandson and start going to demon school.
لم أتخيّل أبدًا أنّني سأصبح
.حفيد شيطان وأرتاد مدرسة شياطين
Wie konnte ich nur der Enkel eines Dämonen werden
und auf eine Dämonenschule kommen?
Increíble. Me hice nieto de un demonio
y entré a una escuela de demonios…
Increíble. Soy nieto de un demonio
y entré a una escuela de demonios…
Je ne pensais pas aller un jour
dans une école de démons.
Pensare che sono diventato il nipote di un demone
 ed ho iniziato ad andare ad una scuola per demoni...
E pensar que eu virei o neto de um demônio
e comecei a ir pra escola de demônios...
Подумать только, стал внуком демона
 и поступил в школу демонов…