Nishino has been married to her childhood friend for over a year, though their relationship spans more than two decades. They've grown so close that each is simply a given presence in the other's life, bonded like family. However, Nishino no longer sees her husband as a man, and gradually began seeking change and excitement, which led her to start frequenting a gym. At the gym, she hopes to meet lean, muscular, and attractive men, flaunting her unique sex appeal as she jiggles her G-cup breasts on the treadmill. As a carnivorous young wife, her allure has now become the center of attention among gym members.