Mahiro is 27 years old. Having struggled with poor health since childhood, she decided it was time for a change and started going to the gym. There, she met Yoshio, a muscular instructor, and grew close to him through training. This time, they're spending the day together in a hotel, combining training with personal consultation. Since Mahiro had only ever seen him in gym workout gear, seeing him in casual clothes makes her heart race. They seriously discuss training goals and strategies, make sure to consume plenty of protein, then head to the hotel. Starting with slow cardio, their bodies gradually heat up—her breathing grows slightly labored, exuding eroticism. The tight spats cling perfectly to his crotch, making the seasoned stud's pulse quicken. As their bodies warm from exercise and sexual excitement, he claims strength comes from arousal, using his role as instructor to touch her body freely. She shows no resistance—soon they're kissing, and he can't hold back any longer. Her wetness seeping through the spats sends him into ultimate arousal. Her toned ass, hard nipples, and shocking shaved pussy drive him wild. Even while sweating, she continuously squirts. Her gentle, upturned gaze and desperate blowjob embody extreme erotic devotion. The muscular instructor relentlessly grinds against her G-spot with fierce thrusting, overwhelming the fragile Mahiro until she's trembling, cumming repeatedly, completely drained. High-speed pistoning churns her pussy juices into a frothy shake. Then, an abrupt, deep creampie angle results in an unexpected massive creampie! Her husband would never imagine his wife—also a gym-goer—being so brutally bred in hardcore fashion.