Inspired by her newfound love for running, Yuka decided to join a gym to improve her speed and endurance. Wearing sportswear that couldn't hide her massive breasts or enormous ass, they jiggled enticingly while she exercised, releasing a potent mix of female pheromones and sweat. Excited by her allure, the trainer recommended the most effective workout for enhancing her speed - "sexual slow squats." Now, married woman Yuka embarks on a personal SEX training journey with her trainer!

ランニングにハマり走力強化のためジム通いを始めた夕子。スポーツウェアでは隠しきれない巨乳とデカ尻がブルンブルンと踊り揺れ、女性フェロモンを含んだ汗がはじける。トレーナーは興奮し走力強化に一番効くトレーニングを提案する、それは「性的スロースクワット」。人妻夕子とトレーナーのパーソナルSEX修行が始まる！