Preston is substituting a class for Veronica Avluv. The problem is that Preston is just a coach and Veronica's class is about sex & modern literature. Preston doesn't think he's qualified to teach that topic, but Veronica is confident that Preston will do well as long as she gives him the right pointers. She decides that the best way to give him pointers on sex & modern literature is by actually having sex with him. It sure seems to work because Preston's confidence sky rockets after their hot fuck session.