[Combined review of all the volumes]

This is the first manga that I've read, and I'm absolutely in love with it. I was hooked after watching just one episode of the anime.

Mairimashita! Iruma-kun [english translation: Welcome to Demon School! Iruma-kun] is about 14 year-old Suzuki Iruma who was sold by his awful parents to the great demon, Sullivan. Sullivan adopts Iruma as his grandchild, and enrolls him in the demon school - Babyls, where Sullivan is the headmaster. The manga deals with Iruma's life in Babyls (whose school song is about killing and eating humans), while hiding the fact that he is a human from everyone.

It is a perfect shonen isekai manga, as it is incredibly hilarious, amazingly drawn, with a fantastic plot. All of the characters are very well thought-out, and the relationships between them are excellently portrayed. The antagonists are also despicable, which is another plus point.