Mahiro, 27, has always been frail since childhood, so she started going to the gym fearing her body wouldn't hold up. There, she hit it off with Yoshio, a muscular trainer, and decided to spend time together at a hotel combining training with personal consultation. Since she'd only ever seen him in gym wear, seeing him in casual clothes made her heart race. They seriously discussed workout routines and diet, making sure to consume plenty of protein before heading to the hotel. They began with slow aerobic exercises, gradually putting stress on the body. Her slightly labored breathing turned erotic, and the way her spats dug into her crotch drove the stud wild. As their bodies warmed up from exercise, they talked about how sexual excitement could strengthen the body, and he began touching her under the guise of instruction. She didn't resist when he kissed her—there was no turning back now. The wetness seeping through her spats was incredible, her toned ass, hard nipples, and surprisingly shaved pussy driving him insane. Despite sweating, she squirted nonstop. Her shy, upturned gaze and tight little mouth delivering intense blowjobs made him writhe in ecstasy. With his muscular physique, the gym instructor pounded her G-spot ruthlessly with brutal thrusts, and Mahiro, once weak and unfit, climaxed repeatedly until completely drained. Hard, rapid pistoning churned her juices into foam, and a sudden, deep creampie angle resulted in a massive, unexpected internal cumshot. Her husband would never imagine his wife, also a gym-goer, getting pounded hardcore and filled to the brim like this—ha!