Throughout the second half of his school day, Kyle noticed a persistent soreness throughout his entire body, deep in his muscles, but he simply shrugged it off and attributed it to the football drills from earlier in the day. Eventually, the final bell rang and Kyle and Eric met up to go back to Kyle's place to hang out after school.
Once they got back to Kyle's house, Eric made no hesitation to fire up a video game and plant himself on the couch while Kyle went to the kitchen to grab them some drinks. After a little bit, Kyle returned with two cans of soda and picked up a controller to start gaming with Eric.
"Dude, take your jacket off. You don't need to hide your string bean arms here" Eric joked between rounds.
"Shut up. At least I'm not vertically challenged like you." Kyle quipped back. In reality, Eric was fairly average height at 5'7". Its just that Kyle stood a gangly 6'5" at only 14, a result of a sudden growth spurt the summer before. Nonetheless, despite Eric's teasing Kyle took off his jacket.
"You wanna go another round?" Kyle turned to ask Eric, but Eric was staring down at Kyle's torso instead.
"Did I get something on my shirt?" Kyle asked as he began inspecting his shirt for stains
"Dude, have you been hitting the gym without telling me? I told you if you went to the gym to let me know! I'm sick of being skinny" Eric said with a hint of jealousy in his voice.
"What? No, you know I would've told you." Kyle reassured Eric.
"Where did those muscles come from then?" Eric said as he pointed at the vein-crossed arm sticking out of Kyle's sleeve.
"I don't know what you're-" Kyle began to retort back, but the sentence caught in his throat as he looked at his own arm and noticed the difference. Kyle immediately shot up and ran to the bathroom to see himself in the mirror, leaving Eric behind, confused, concerned, and a little bit jealous of his friend.
After stumbling into the bathroom, Kyle immediately took his shirt off and his jaw dropped at what he saw, and what he saw was long, lithe but ripped muscles.
He reckoned he gained about 15 pounds of muscle, which spread across a 6'5" frame was less significant than it would've been on someone shorter, but with how skinny Kyloe was to begin with, combined with his low body fat, the difference, if not pronounced, was noticeable.
His previously flat chest now had the beginnings of pectorals just starting to take shape. As he flexed them, striations erupted into bold relief across his pecs. His shoulders looked less bony and had small caps of muscle as well, which led to wiry arms. A bicep not wuite yet the size of a tennis ball rose from Kyle's arm when flexed it. A large vein ran down his upper arm before splitting into a roadmap of veins that ran down his lean and corded forearms. Below his pecs sat a set of abs like Kyle had never seen in real life. His new 8 pack was flat but incredibly defined, each bump and ridge visible even unflexed. Kyle tried to pinch his stomach but only succeeded in pinching a paper thin layer of skin. His nonexistent bodyfat was further evidenced by the network of veins that rose from his Apollo's belt well up his abs, almost to his pecs. Kyle lifted up the legs of his shorts to get a better look at his legs. Looking less string bean-like, his lithe legs looked more like those of a runner. Each head of his quads was clearly defined and were just as vascular as the rest of him. Calves like diamonds stood out from his lower legs.
"Holy shit" Eric said from behind Kyle, looking at his friend in the mirror.
"Yeah, holy shit" Kyle said, equally as dumbfounded as he continued flexing and checking himself out. "I guess football practice is starting to pay off. Looks like you got some catching up to do, short stuff" Kyle said with a huge grin as he slapped Eric on the shoulder, harder than usual thanks to his increased strength.
"Well, you still wanna go another round?" Kyle asked, referring to their earlier video game session. As he asked, he put his t-shirt back on. Since Kyle didn't add much mass for his height, the shirt fit him largely the same, still loose and draping off his more defined shoulders. With his shirt on, only his newly defined and vascular forearms betrayed his recent development.
"You bet. You may be getting stronger but you're still a string bean. And I can still take you any day at video games" Eric said as he pushed his jealousy out of his mind. Kyle was still his best friend after all.
"You wanna bet?" Kyle retorted. The two boys ran back to the TV and were sucked back into their game like before, not giving Kyle's new musculature a second thought.