JUY-651 The obscene workout attire of my wife's friend drove me mad... Yuino Saihara

Having not exercised recently, my body had become slack. At my wife's suggestion, I decided to have Yui, a former gym employee and friend of my wife's, teach me training exercises. Even after marriage, Yui continued self-training and had a very beautiful physique. Just the thought of one-on-one training made me nervous inside. On the day of, as Yui, dressed in form-fitting sportswear, guided me through weight training step by step, I unconsciously became aroused…