The two girls and I locked ourselves inside an empty room. Izzy had begged me to watch over her while she tried this drug with her new friend Lily and I, being a good boyfriend, agreed to do so. I sat on the bed while the girls decided to give Grow X a shot while sitting down on the ground. Both of them drank it and, in the blink of an eye, the effects started to appear. Almost simultaneously, both girls grabbed their stomachs. I almost jumped out of the bed but decided not to as I started to witness something out of this world. At the same time, the girl's bodies started to expand. Slowly, both of them began to grow larger and more muscular, filling their costumes with their new mass. Both of them moaned softly as they grew, giving me a raging boner which I tried my best to hide. Both of them grew to almost the exact size, Izzy kep her lovely chubby face while her friend Lily also appeared to retain her facial features. The girl's bodies, however, were absolutely massive. They