Two trainees are tied to modified exercise bikes. Their goal is simple: Pedal as fast as possible and try not to cum. That’s easier said than done though, as each trainee powers the toy inserted into the other trainee. The fast you go, the faster the other’s toy moves~ This is a game of stamina self-control, where only the trainee with the most control over their own body can win. The winner is free to go and rest for the remainder of the day, the loser’s bike, however, gets switched over into automatic mode where the toys move on their own until their trainers get bored. Exhausted and broken, the losing trainee is stuck on their bike with nothing to do but give in to climax after climax until someone has mercy with them~