Julia told Emma that she would rather go with Emma just to be safe. So Emma put on a sundress. Julia went inside Emma's dress' chest pocket. Julia noticed that Emma wasn't wearing a bra and remembered that Emma usually went commando like Julia.
When they got to school, there was an assembly so everybody filed into the auditorium. Emma actually went up to the stage to receive a science award. Just then, Julia felt herself get bigger and bigger. Suddenly Emma's dress ripped as Julia grew and Julia's leaf dress was ripped!
A few seconds later, Julia and Emma were both standing on the stage, fully naked. Julia, with her small boobs and slightly hairy pussy, and Emma, with her flat chest and bald pussy.
They both covered themselves and ran out of the school back to Emma's house.