Matt had just walked into his room when he got a text from his friend Alex. "Dude, I got something you gotta see. Video?"
"sure" He punched up the call. When it connected, there was a cartoon wolf grinning back at him.
Alex's voice said "Check me out!"
"Woah! Is that a new filter or something?"
"Pretty cool, right? And look!" Alex pulled the phone back to show off his thick pecs and broad shoulders.
"Wow, it does more than just your face?"
"Isn't it awesome?!" Alex brought the phone back to his head. "And that's not even the best part! Here, let me show you." He waved for Matt to move in. "Look close so you can really see the detail!" When Matt brought the phone up to his face, he continued, beaming. "You're not gonna believe this! Look riiiight here!"
Alex dropped the phone down to his huge cartoon dick, pushing it down with the bottom edge of the phone before letting it spring back up and though the screen to smack Matt right in the chin! When Matt moved back in surprise it shot a huge load of cartoon jizz all over his face. "Gah!"
"Yes! Got ya!" Alex said. Matt reflexively tried to wipe the inky goo away, but that only smeared it over more of his face and hands. As he wiped at the edges, the black ink outline around the cartoon cum started to bleed into the white, making the ink covering him darker and darker.
Meanwhile, Alex said "Oh man, I have got to see this!" Cartoon claws grabbed the edges of the now-toon phone and pulled. It took a little effort, but he eventually got it stretched to the size of a doorway and walked into his friend's room. The goo covering Matt was almost completely black now as he pulled more and more ink from the still solid outline, but Matt wasn't trying as hard to wipe it off. The ink was making him feel... tingly. Tingly and good, like his face and palms were constantly getting a lover's caress. He absentmindedly began to run his hands over more of his head, covering more of himself in the ink. The tingling spread, and he could help but let out a soft moan.
"That's the way, man," Alex said. "Here, let me help you out." He flexed his claws, and there was the *shing* of blades being drawn. Cartoon eyes blinked open on Matt's face, then bulged out of his head as he saw Alex slashing down at him. He flinched away as the claws flashed down and... nothing happened. Then all of Matt's clothing slowly fell to ribbons and drifted to the floor—shoes, underpants, everything—leaving as naked as the wolf standing in his room.
He got a good look at Alex then. He was huge, ripped, stupidly hung, and proudly boned up. And he was staring at Matt with pure lust. The desire in Alex's eyes plus all the meat and muscle on display ignited something in Matt, pushing his "tingly and good" feeling straight past horny into really horny. He licked his lips. To his surprise, that cleaned off the ink covering his hands couldn't wipe away. It also dropped a bomb of pleasure into his core. A long cartoon tongue spiraled out to clean the rest of his face, revealing the head of a toon panther before he swallowed with an exaggerated gulp. A bulge went down his throat to his midsection and bounced out to his limbs, making him slightly taller and burning off some body fat as it went. Matt's whole body was buzzing with pleasure now, and he had never been so hard is his life.
Alex had never been so hard, either. Just the sight of Matt's changing body and straining erection was enough to make him moan. That drew Matt's attention, so Alex began to flex in place, making the muscles he could pop without changing his stance, trying to push Matt even further. "Dude, you're gonna be so hot! I got a pic from Erick and Steph and they're both ripped! I got Erick with a vid clip, and he got Steph with a pic! Imagine how you're gonna turn out if you drink for the tap." He pushed his hips a little closer and grinned like only a cartoon wolf can.
It was all the encouragement Matt needed. He grabbed Alex by the ass, took the tip of his cock in his mouth, and pulled. Alex's entire prodigious length slid forward until, somehow, his plump balls hit Matt in the chin. Matt didn't even gag.
Alex was already close from watching his friends first changes, and from the anticipation of what was coming next. Being so hilted in Matt's mouth so quickly and with such need was all it took to tip him over the edge. He threw his head back with a cry of pleasure and let bulge after bulge of cartoon cum flow down Matt's throat.
Matt felt amazing. Every gulp was making him feel hornier and sexier at once, and Alex showed no signs of stopping. Matt moaned around Alex's cock and began to knead his ass, closing his eyes and letting the transformative seed wash through him. The black fur on his face and hands began to flow over his body, enhancing everywhere it touched. First it moved down his thickening neck and across his shoulders, which widened and rounded with muscle. From there it moved down his arms, biceps and triceps inflating as the the hands still feeling up Alex's ass grew claw tips.
The fur moved down his torso, hard pecs pushing out from his chest and nipples becoming more sensitive. Below, belly fat melted away to reveal cut, defined abs. Matt's back toned and his waist narrowed, completing his upper body's new V shape. Deep ridges formed around his abs and hips, the new Adonis belt leading down to his cock, as his ass ballooned into a beautiful bubble butt. Below, his thighs and calves thickened and his feet grew claws even as they lengthened into a digitigrade stance. Finally, his balls swelled and his cock plumped up, growing in both length and girth.
Feeling himself grow toppled Matt over the edge. His release tore out of him, pulsing in unison with Alex until they both came down together.
Falling back, each took a minute to catch their breath. Alex broke the silence with a giddy grin on his face. "Dude, you gotta check yourself out!" He pulled a handkerchief from somewhere and wiped up their mess with a couple of swipes, then produced a body length mirror. Matt stepped up to it and was dumbstruck at the reflection. His mundane human self had been replaced with an anthro panther right out of furry's wet dream. He had a lithe, cut runner's build with bulges in all the right places. He'd just blown the biggest load of his life, but just checking himself out was enough for him to start getting hard again.
Alex came up behind him. "See, now this..." He and pressed into Matt's back and reached around him, one hand going high to grope a pec and tease its nipple, the other going lower to tracing along his abs before grabbing his cock and giving it a few slow pumps. "This is the best part." Matt leaned into him and moaned softly. He couldn't help but agree.