I don't remember any back lash he said if he had gone through with the ntr he would have had to end the manga earlier there was an interview with the editor where what was originally going to happen was discussed he was going to have better chemistry with agawa and her sister and they were going to lose interest in gotou and he would go back to being a loser brainrot as he put it.What was the backlash than? Someone in this forum said it was chapter 35-36 with the teacher and this chapter got retconned