I liked how all the girls that have liked him are getting ready to beat those bullies' ass into submission, especially Shirai.
There's a hint that Shirai are going through such lengths just to protect her beloved sensei. I think the reason why she didn't fight yuzukami yet is because of her position as the chairman's daughter. If she ever lay a hand on her, she will never see or go near her sensei again. She wouldn't have excuse to feed him delicious treats again if she does that.
Same goes for her friends, since nepotism is at play here. Yuzukami is powerful at school so no one would dare to touch her or get in her way.