This is what happens when you cross GTO with a tentacle monster with a dash of assassination:
Assassination Classroom Manga
Assassination Classroom Manga
And it's the GTO pedigree that overrides the tentacle tropes
O.o
It's pretty funny. Is there an anime out?
Silly question. of course there is.
it was last seasons anime, it just ended I think(?) unless i missed something about it being 2-cour