Yo the ppl in the comments with all my love: yes is wrong. Yes the sense I could wait for her to turn 18 and not being his student no more but please realize is us a shi*** plot and sadly so ppl idealize this kind of romance is so sad but is what it is. I was really rooting for the sensei to do nothing and maybe see them like meeting after a long time and start dating but Japanese Ppl sometimes are weird