Mark, curious, pushed the button on the top of the box. The lid opened with a 'click', revealing a multitude of vials. They were all a different color, most of them vibrant shades of red or blue. Each one was labeled with a picture. As he stared at the collection of potions, he wondered why they were labeled with pictures rather than words. After a moment of thinking, he dismissed it and began to look through to see which one he would try first. As he searched through the neatly placed vials, he noticed one with a picture of a man on it. It confused him. Why would he want to transform into a human if he already was one? Perhaps this was some different manner of modification? What struck him as more interesting, however, was the fact that the man on the vial was none other than him! He figured whatever it was, it probably was nothing of interest, so, for whatever reason, he decided to test it out. He popped open the cork and smelled the deep blue liquid inside. The smell was not repulsive, but it wasn't something he enjoyed. He considered it a relatively neutral smell, compared to what he had expected. He quickly downed the contents of the bottle. It tasted like cough syrup, a taste he particularly didn't enjoy. Despite this, he forced himself to finish the drink before continuing looking through the vials. He had seen about three or four more vials when he felt a tingling sensation throughout his body. It felt good. He fell to the ground as he was suddenly constricted by a wave of pressure and pleasure. His clothes began to get tighter, and he loved it. He began to get aroused by the feeling. His rock-hard penis only made it worse. His clothes continued to shrink on him. He felt his entire body forcing outwards as he shot up several feet at a time. Suddenly, his tight jeans ripped, leaving only stretched boxers. As he continued to grow, the pleasure intensified, but the pressure was over when his remaining clothes ripped away. With the absence of his boxers, he watched his erection shoot up out of his pants. The sight of his genitals only made him more aroused and made him continue growing. He bumped his head on the ceiling, now curled up just to avoid breaking through his roof. He sat on the ground, crushing all furniture and taking up the whole room when his growth finally stopped. However, he was slightly alarmed when his penis kept on going. He felt wave after wave of insane pressure as his penis snaked its way past his ankle, finally stopping near his foot. By the time it stopped, it was already spraying cum everywhere. With a slight pang of regret, he realized what had just happened. He decided to...