Ngl.. at this point. Since the relationship with the teacher already is horrible. I'd slap the teacher as well. What's he gonna do suspend u. U have the rest of the teachers as witnesses to him hitting first and u can continue to threaten him about the fines and stuff. Although it's unnecessary...
It's ok.. the harem is as usual a point that kinda just makes it worse. But at least it's played as a bit more of a joke making it bearable although far from ideal. The entire thing is pretty dumb and there really isn't any point the the whole thing (well there is but the story is so unserious...