You play as Daisuke Sato, an average salary-man who gets offered the chance of a lifetime : a membership at the highly exclusive, ultra posh Silver's Gym! But things take a dark turn when you are laughed at and humiliated by the other members, tall muscular girls who look down on weak men like you. In your time of need, however, you meet with Minami Nakayama, a soft-spoken and motherly mature woman with the body of a yoga instructor. She will ease your pain and soothe your soul, but what are her true intentions? How far are you willing to go to please Minami? Will you end up giving in to your vulnerable side and finally call her...Mommy?