Yui, an office lady working at a design firm. Usually seen in a business suit, her big tits become visible under tight ribbed knitwear. Feeling stiffness in her shoulders and lower back during daily work, she finally visits a hospital. The doctor immediately suggests a "meat rod treatment." Using medical jargon and smooth talk, he easily persuades typical office ladies into sex. As she's approached with black pantyhose, she mutters "perverted," yet submits. While carefully massaging her tense muscles to avoid suspicion, he skillfully targets sensitive areas near her pussy and underarms, gradually transforming her expression into that of a submissive woman. Does she squirt from sheer pleasure? The cock thrusts deeply into her pussy, and her body can no longer resist.