Succumb to pleasure under the expert hands of sadistic masseuse Hibiki Otsuki, as married woman Yurina Aizawa descends into submission. Yurina, wife of a major e-commerce CEO, returns for a repeat session—this time experiencing the hidden back-menu treatment. Hibiki meticulously teases Yurina's ample G-cup body, slowly awakening desires she never knew existed. Amidst a tense, humiliating atmosphere, her dormant masochism emerges. Though she never imagined being with another woman, the sensation is overwhelmingly pleasurable. Soon, she can't resist the urge to be deeply penetrated with a strapon, craving more intense stimulation.