Brie is a relatively unknown face (and physique) on the futa bodybuilding scene, and she's worked hard to keep it that way, because she wants to make a big splash the first time she steps on stage. Brielle purposely stays away from social media, training at her home gym, and keeping her chiseled body covered up when out in public. For years she's been building up her body in the dark, savouring the anticipation of the big reveal. Brielle is especially looking forward to the group posedown part of the contest, her best opportunity to truly upstage the other girls. Brie imagines stepping in front of another competitor and flexing her rock hard bicep right in front of their face, blocking them from the audience's view. Just the thought of upstaging the other girls like that gives Brielle a stiff erection that strains at her spandex shorts, twitching and throbbing with each and every flex of her muscles... just the way she's been practicing. She wanted to be able to tear out of her shorts completely hands-free, with nothing but the force of her flexing erection, so she bought a dozen pairs of the stretchy shorts to practice with. As it turns out, what she really needed to practice – was not ripping out of them prematurely as she goes through her flexing routine. Brie's bicep flex is always the hardest one not to get carried away with. The feeling of her own arm packed so tight with so much power – arouses Brie so much that she's always tempted to let lose and put her full strength into the flex. But that would inevitably send her over the edge into a pants-ripping orgasm – which, make no mistake, Brie absolutely does plan to do on stage, but not until the posedown...