Recently, due to lack of exercise, my body had become flabby, so on my wife's suggestion, I started receiving personal training from her friend Yui, who used to work at a gym. Yui, known for maintaining an incredibly fit and beautiful physique even after marriage, was going to train me one-on-one, making me secretly nervous and excited. On the day, as she guided me in her sportswear, I couldn't help but get aroused despite myself.