An adultery sex film by Ai Mukai, Body shape is always an issue that women care about, no one wants to have a bad appearance, that’s why Ai invited her husband to go to the gym with her. to practice under the guidance of a male coach. However, due to the nature of her work and her inherent dislike of exercise, her husband soon gave up, leaving her alone and the tall, dark-looking coach who still exercises regularly every day. But day by day, he noticed more and more strange changes in his wife every time she came home from practice. Suspecting that she was having an affair after seeing her and the coach looking very intimate, he secretly set up a camera to record it. sound in his wife’s gym bag. The result came to him as a big shock when he turned on the recorder, only moans and the sound of flesh continuously touching each other…