For Yui, who has lost her body and confidence as much as before, masturbation has become a daily routine. Yui decides to go to a fitness gym to regain her former glory. However, the real purpose is a handsome trainer. The trainer's guidance is a racy exercise that barely touches the etch. The act gradually escalated and Yui and the handsome trainer's secret lesson such as dildo squat, stretch fellatio, raw insertion squat began.
