You get to the park where your meeting your friends. They are:
Liz: A teen your age with small to average sized breasts but overall is attractive
Maddi: A short teen your age with small (almost flat) breasts but is quite pretty.
Amanda: A teen your age with average to slightly bigger than average breasts.
Your the only guy running in this group.
You explain to them all about the medallion and then you all set out thinking of what the first bet should be. Finally, you suggest that the winner of the run gets to change the other three in whatever way they want that will last for the next day, until you all meet again to run.
Everyone agrees and then the race begins.