A widowed swimming coach who fell into a trap is forced to undergo masochistic swim lessons at a secret club for the wealthy. The thin fabric of her competition swimsuit emphasizes her massive tits, and the ropes of her clothed bondage dig deep into her voluptuous breasts. The rotation of a waterwheel intensely rubs against her crotch rope, awakening a sweet ache and pleasure. Although she tries to resist the masochistic training with words and deny it with reason, her body honestly continues to crave the pleasure. Her hidden masochism gradually blooms, and she is swallowed by waves of sensuality. The sweet trembling and moans of her massive tits echo throughout.