Wife Rio has G-cup breasts and supports her husband's work as an editor for an SM magazine. Determined to help him, she resolves to enter the world of BDSM herself. Challenging her is the legendary SM writer, Master Oni Yatsu. His bondage techniques go far beyond anything Rio could have imagined. Bound tightly in the garden until she loses control of her bladder, subjected to vibrator torture in the Daruma tie, the rough hemp ropes biting into her pale skin until it turns red—her ordeal leaves viewers trembling. As the ropes creak under her weight, she is penetrated by a throbbing cock, hung in suspension, gushing squirt after squirt, surrendering completely to intense domination. This ultimate SM scene delivers a powerful shock to countless fans.