I watched this expecting a nice lighthearted slice-of-life comedy to fill a gap between some serious and gory animes to keep my Chi in balance.
I was treated to 12 episodes of student with full mental faculties bullying and manipulating a clearly special needs child. (Has no impulse control, has no control over the volume of his voice and incapable of recognizing basic causal relation.) That's the premise for 12 24 min episodes. If that sounds like something you enjoy, Karakai Jouzu no Takagi-san provides.
I hope that teachers in Japan don't actually use their mentally challenged students with no volume control as target practice for throwing chalk. That's a legitimate thought that came across my mind as I watched this.
It wouldn't be so bad if the story actually progressed somewhere, but 12-episode adaptation syndrome is in full effect, so story goes nowhere.