Sweetie gets her asshole ruined by an angry teacher.
It is simply impossible to tolerate when a sexy but lazy student turns your work into nonsense. You tell the cutie to draw something and what comes out of that task? Sure, her laziness simply demands a good punishment. So, the dude spanks that beautiful and round butt at first and later tells her she needs to work with her three holes if she wants to get a good grade and to get out of college at least someday.