[Umino Sachi] Gakkou... Dai san wa inka ni oboreru..

A chance encounter at a convenience store turns into a dangerously bold affair when student Taniguchi Kazuki carries his married principal Yuko's heavy shopping bags all the way home. With her husband unexpectedly returned and hiding out in the bathroom, the pushy young stud seizes the moment, making the sweating, big-breasted Yuko admit how far she's fallen for him while he pounds her plump body within earshot of her oblivious spouse. The thrill of nearly being caught only stokes their fervor, culminating in Kazuki pumping his load deep inside his quivering principal as she cries out his name in ecstasy.