Men who are proud of their muscles gather in the gym, and trainers have a strong desire for more than one person. You will be tempted to show off your peach butts with a daunting training outfit, aiming at only the macho member men who seem to have physical strength and energy. After training, you will be slapped in a pumped up brain muscle cock and hit the pre-ketsu to reach the top again and again! Gradually, the desire for sex diverges!