I'm an elite teacher at a certain school, but I've been assigned to tutor a pair of problem twins. They provoke me, a virgin, by showing me how they masturbate, and in a fit of anger, the bratty sisters end up discovering my weakness. "Ahh! I'm going to punish you, pervert teacher!" They take the upper hand and tease me innocently, teasing me with their double teasing, and then they cum over and over again, sucking out every last drop of semen...