I have watched over 80 J-dramas and this is the worst I've seen.
It can be entertaining but its only audience target is still delusional teenage girls (I say delusional in the sense of naive). None of it feels real or relatable.
Production wise I think it's average.
But plot wise, I know it was a manga before, but I felt disturbed with so many imoral things presented. The incest theme and, the worst for me, the teacher interest in the main protagonist.
I don't recommend watching it, but if you want to risk it, go ahead. You can laugh of cringiness in so many moments.
It seems the movie is a tad better.