You scan the beach looking for your shoes, and notice a pair of sandals, not sure who they belonged to you pick them up and decide that you'd try them out, they probably belonged to some cool surfer guy. As you're walking to the changing shack you notice the sandals have an odd little wedge, not too high but noticeable on them, you brush it off as just an odd design you haven't seen before.
Getting to the shack you slip the sandals on, the socks started their magic, but this time much faster, you felt different, the sandals had been somewhat tight and now they fit perfectly, you watched as something started happening to your legs. They were getting softer, the hair receding and you were starting to get subtle curves, you realize these were women's sandals and went to take them off only to find they wouldn't budge. Your changes sped up to a more rapid pace as your hands and arms followed suit becoming more feminine, you felt your ass and hips expanding, starting to strain your brother's shorts as they filled in. You looked down and saw that you were gaining breasts, they expanded as they made the tshirt tighter. You turned your head and black curly hair fell in front of your face. You stood up and looked at yourself in the mirror at the changing building, there standing in front of you was not Benji but a very plump and curvy woman, but you notice that your skin is changing color, your eyes widen as you finally finish changing, becoming a carbon copy of Rianna, Miranda's curvaceous and busty black girlfriend, you gasp in her voice, you always thought she was kinda cute but you never thought you would want to be her.
You stumble out of the changing rooms, trying to keep balance with all of the curves you just gained, you weight now distributed differently, you decide to go home as you figure out to what to do next.