This setup was amazing. Like high quality the entire time, amazing work. It establishes several characters motives, personalities and goals while giving them distinct design. If the manga is even half as good as this chapter we're in for a ride.
Also there is NO WAY that the teacher bullies the girl. I would expect him to understand how horrible it was to be abused and he couldn't inflict that on an innocent girl. Really hope he extends a hand instead of hurting her.