It was like watching some strange form of nature strip in fast motion, like one of those clips of a plant rapidly growing. One second Hiro was sitting there, his normal self, and the next, accompanied by several harsh gasps, he began to sprout up! Erik and Kurt watched in silent awe as every gasping breath surged Hiro larger, wider, his legs stretching out in front of him across the floor, his back moving up along the bed, disrupting the covers there and tousling them around, his arms lengthening as he his thickening fingers gripped convulsively at the carpet. Hiro's chest heaved with his gasping, his shirt tightening around his chest, the hem riding up along his smooth, olive stomach, revealing it to the two brothers, the hems of his pants following a similar process, revealing more and more of his legs. His socks were bulging and deforming as well, as his feet grew longer and wider, his toes poking insistently at the ends of the socks, the threads straining to hold back his increasing girth... to no avail. With a loud RIPPING sound, those same digits poked triumphantly upward, tearing through the cloth prison attempting to entrap them, gently wiggling in the cool air.
The rest of his clothes began to creak in similar fashion, clinging to his body as though trying to contain him, every inch of new flesh coming into existence a rude resistance that couldn't be denied. The button on his pants suddenly burst off, flying between the two brother's, pinging against the wall as the soft whisper of a zipper coming undone, Hiro's bulge appearing behind it, clad only in a pair of bright red briefs. Kurt looked away, embarrassed that his brother's friend was becoming increasingly exposed, but Erik looked on in awe, eyes scanning every inch of his friend, watching his growth raptly. The seams began to burst around his shoulders when the growth finally seemed to come to a halt, Hiro a panting mess on the floor. The young Asian man slowly calmed down, pressing his hands against the floor as he, shakily, rose to his feet. He let out a soft gasp as he realized he was looking directly into Kurt's eyes.
"Hiro you... you're..." Kurt stammered, unable to fully process what he had just witnessed.
"You GREW! That's so COOL!" Erik immediately shouted, jumping up in the air, moving around Hiro as he did so. "Look at you! You're as big as Kurt! This is AWESOME! Wait until everyone at school gets a load of you!"
Hiro was quiet as he looked over his body. Everything appeared to be proportionate to when he was his normal size... just bigger. It was as though someone had double clicked on him, selected resize, and just kept clicking the + until he Kurt's height. His shirt only half covered his torso now, looking more like a failing crop top, his back visibly rippling under the skin tight material as he shifted uncomfortable. Down below, his pants looked more like shorts, the waistband only held in place at this point from the sheer thickness of Hiro's waist. Even further down, his socks were ruined beyond repair, the ends of them blown open and stretched so much that, if he removed them, the entire thing would look like nothing more than rags. He ran his hands down his exposed skin, warm and soft, and undeniably him. He looked down at Erik and couldn't help but notice how... adorable his friend looked, so small and excited. Turning back to Kurt, Hiro blushed slightly and said, "So... uh... this is kind of... weird, right?"
"More than kind of." Kurt said, unable to stop a little laugh from escaping his lips. "I'd have to say this is unprecedented."
"Hey Hiro, how do you feel? How does being BIG feel?" Erik asked excitedly, practically vibrating.
"I feel normal just... bigger. Heavier too." Hiro said, moving his stance slightly, the floor creaking more than it used to under his feet.
"I bet you're stronger too! Think you can lift up my bed?" Erik said, pointing at the furniture in question.
Hiro scratched his head and said, "Uh... maybe? I guess I could try."
The idea seemed kind of silly but Hiro would be lying if he didn't want to know the answer himself. COULD he lift it up? Before he could even try, however, Kurt grabbed his arm and pulled him back slightly, surprised by the heft the boy now held in his body.
"Hold on Hiro! No physical exertions, remember? That's probably what made you like this!"
Hiro hesitated, relishing the feeling of Kurt's hand on his bare skin. His heart had just started thudding a bit more fiercely when Kurt let go again. "O-Okay... I won't."
"Wait a second..." Erik said, settling down enough to think something through. "You think that us wrestling around made Hiro grow?"
"Yeah, after you both took those weird pills." Kurt said, frowning slightly again, both at the irresponsibility of his parents, himself at leaving them out, and the kids for just popping them unquestioningly into their mouths.
"So how come I didn't grow? Lame!" Erik said, feeling a bit cheated now.
"Maybe you just didn't have to exert yourself as much because you're fa-a-aaaaah stockier than me." Hiro said, quickly catching himself before he accidentally said something hurtful.
"Hmmm... you might be right!" Erik said, a mischievous gleam in his eyes. Before he could move, however, Kurt scooped him up in his arms, holding him fast in a bear hug.
"Oh no you don't! I'm your brother, you think I don't recognize that look? No exertion!" Kurt lectured.
"Oh come ON, bro! This is favoritism! I'm your brother, let me be BIG!" Erik argued ridiculously, struggling and fighting while Hiro looked on, not quite sure what to do.