If the Long Duck Dong character from Sixteen Candles grew up to become a teacher, he'd be interchangeable with Punishment's protagonist Professor Kayama. In this animated effort, the principled, nerdish professor refuses to grade on a curve, even when a few of his tasty students offer their own curves in exchange for the boost.

A sultry trio decide to blackmail Teach by drugging him and then snapping incriminating photos. What neophytes! Kayama cleverly turns the table of humiliation around in his favor and winds up debasing the girls with private bondage lessons. Evidently, the mind is a terrible thing to waste - but higher education cums at a cost.