After her only son left home, Reiko decided to start enjoying her second life and began going to a sports gym. There she happened to meet her son's friend Akira. One time, she got injured at the gym and asked Akira to take her home, where they ended up having sex. Since that day, Reiko can't forget the intense thrusting from his muscular body. Ever since then, every time she meets Akira, she feels a throbbing in her crotch and harbors unwarranted expectations…
