Master InstitutionX teases a bound submissive with relentless prostate play. Using a sleek prostate massager, he explores the sensitive gland, edging his prey close to the brink of ecstasy, only to deny them release. The submissive, locked in a tight chastity device, begs for mercy as their prostate is milked, but InstitutionX is ruthless, pushing them further into a state of desperate, unsatisfied arousal.