When Evan woke in the morning his legs and feet were dangling off the end of his twin sized bed even more than they were the night before. Evan smiled to himself realizing that must mean he'd grown more. He jumped to his feet and noticed how tight his compression shorts were. They had barely fit over his massive cock the night before, but now thanks to his overnight growth, his thighs and dick had become so big that the compression shorts were almost hurting him.
He ran towards his bathroom, ducking his head as he went in. When he looked in the mirror, his jaw dropped. More hair had grown in as expected. His facial hair had become a perfectly trimmed beard. It was dark and full and soft, everything he'd wanted. His legs and arms were also covered in more hair. His chest had become a dark forest of wiry chest hair. He could see his pubes extending up from the band of his shorts. The biggest change, however, was the muscle growth. He knew the potion had already caused some muscle growth before, but this was the most significant growth yet. His biceps had become football sized mounds of solid muscle. His thighs were massive and led down to diamond-shaped calves. Evan looked at his chest and abs. He counted an impressive 8-pack. The abs were so deep and defined that even with the hair covering them, he could see every single crevice. He chest had ballooned outwards, creating a massive set of pecs. None of his shirts could possibly fit him now he thought.
He looked down at his now size 14 feet and then back up at the mirror. Evan figured he had to be 6'5" now. He'd measure later to be sure. His face had changed slightly too. His eyes were more green, his cheekbones higher, his jawline more defined. He was hot. The kind of guy who could pass for a model or Instagram fitness influencer.
He reached one of his massive hands up to his pecs and began to feel the hairy mounds of muscle. His hand ran over his nipple, which was so sensitive that his dick started to harden from just the slightest touch. Evan realized again how terribly uncomfortable his shorts had become. With his one had still massaging his nipple, he reached his other hand down to the waistband of his shorts, where he grabbed them and ripped them off in one clean movement. It was easing considering how much stress they were under and his newly acquired strength. From there, his dick was free to become more and more erect. Looking down, Evan thought his dick had to be 12 inches and as big around as a soda can. He was pleased the potion had included his dick once again in the growth. He let out a deep chuckle, shocked at how deep his voice had become. "Wow," he said in a low bass that made him more erect. "This is incredible."
Evan went back into his bedroom naked. His parents would be gone for the weekend. He had all day to himself. He went for the weights and started doing some reps, but quickly noticed that none of them were heavy enough for him. Even his brother's biggest dumbells were too small for Evan's new biceps. He thought about going to buy some new weights, but a quick glance over at his closet reminded him that not a single piece of clothing fit him anymore. His new feet dwarfed his old sneakers and none of his pants could possibly be long enough to accommodate his new height. Thinking about how much he had grown just made him horny again. He rushed back into the bathroom and headed for the shower. He wrapped one hand around his around his freshly enlarged tool, and with the other, he rubbed his new furry pecs and sensitive nipples. Evan only pumped a few times before he came all over the tile walls. His new super sensitive dick didn't take much, especially when he was horny.
Evan heard his phone ding back in his room and went looking for it. It was a message from Dylan --Leaving now, be there in 15-- Suddenly, Evan remembered that Dylan was coming to spend weekend so he wouldn't be all alone while his parents were gone. They'd made the plans months before, but Evan had forgotten about it. Dylan had barely recognized Evan at school before this last growth, and now he looked even less like an 18-year-old highschooler, and more like a pro athlete. Evan glanced over at his dresser, where the half-full vial still sat and thought about Dylan coming over. He knew exactly what he was going to do once Dylan arrived.