Welcome to Demon School! Iruma-kun - Kalego Gaiden - Ch. 1 - Kalego Side Story: Part 1

[MangaDex]

 

[Jellyman_i_guess]

It's funny that a "top dog" has cat ears

 

[alacaelum]

Opera-sama is above mortal concepts of gender.

This is how Kalego-sensei's suffering started, if he had heard Balam-sensei's advice and let it go... his life would have been so much easier.