In a unique twist on BDSM, petite Japanese mistress Mean trains her masochist men as human racehorses. The ponyboys, erect and eager, are collared and leashed, their genitals bound in CBT devices. Mean, Okawa, and Hole Man take turns riding, spanking, and guiding the men in a heated, three-way race. The mistress' subtle touches and commanding voice drive the ponyboys to their limits, their bodies glistening with sweat and desire.