Reiko's only son leaves the house and now she starts going to the gym to enjoy her second life. Then, he accidentally meets his son's friend, Akira. One day, he was injured at the gym and had Akira take him home, and by chance he ended up having a physical relationship with Akira... Since that day, Reiko will never forget the intense thrusts that have been released from his strong body. Since then, every time I met Akira, I started to feel ache in my crotch and have unexpected expectations...