When it comes to school-based fantasies, the Japanese have no peer; as their countless variations of Manga/Anime prove with unfettered devotion. Xtra Credit isn't groundbreaking stuff, but it gives the viewer a nasty education at an accelerated rate.

Miyuku is a naïve new professor-babe, who receives schooling in the way higher education operates these days: servicing the ancient Dean and his sub-ogres on campus; tutoring Sex Ed in the dorm. Actually, Miyuku comes to love the submissive life.

Between (literally) brown-nosing the tenured staff and bonding with her students, one harrowing scene finds the Prof being forced to suck off an undergraduate inside a bathroom stall. Unfortunately, Miyuku holds it in so long that she winds up in a puddle of her own piss and shit - while still engaged in oral sodomy. It's powerful stuff like this that still manages to stagger one's faculties. And to think, people once though Lady Chatterly's Lover was racy literature.