Mark blushed, reaching down to fondle his new buck cock. Meanwhile Angus nosed and licked at Mark's new, plump deer nuts. "Ah, Angus stop their so sensitive! Oh.. Oo-oooooh..!" The boy scout moaned, bitting his lower lip and tugging at the hem of his uniform shirt, writhing as the anthro buck's thick tongue traced down his taint, and across his tight virgin asshole.
A trail of light, soft white hair was left in the wake of theAngus' tongue. The downy fur tickled Mark's pert butt-cheeks and thighs, and he spread his legs, giggling at the feeling. He felt a pleasurable "pop" as a cute deer tail sprouted from his ass.
Angus looked up at his slowly transforming tent-mate from under the boy's disproportionately huge nuts with seductive golden bambi-eyes, working his tongue deep into Mark's virgin ass. Mark gasped, and reached down to grab his knees, puling them up to his lithe chest. His cute ass spread for the sexy stag worshiping his new tail-hole.
"Oh fuck, that feels so good... your tongue is so thick!" Mark moaned, grinding his ass onto his friend's muzzle. Brown fur spread across his thighs, as his ass doubled in size, becoming muscular and covered in a thick layer of fat. "Deeeeeeper! Fill my deer-boi ass..."
The scout's head fell back as he reached down to fondle his new massive buck-cock, achingly hard despite having cum minutes prior. His other hand unbuttoning the top two snaps of his uniform and sliding under to toy with his fat teenage nipples. His knees bobbing by his head, already strangely long and covered in sparse, brown fur. His feet becoming cloven deer hooves.
"Ooooh, god..." Mark gave into the changes. Yes, he wanted to become a sexy stag like Angus had... but he wanted something else too... Thick pecs that lead to a bulging neck, and powerful arms. With deep sexy, baritone voice that rumbled from his massive chest. Walking upright through the forest half-man half-beast. Yes! His cock throbbed. He wanted to be a sexy anthro-stag.
Angus' nose twitched as the young scout's ball-musk mixed with his increasingly animalistic taint sweat, the scent of a young buck in season driving Angus absolutely insane. The muscular stag pulled his tongue out of Mark's tailhole, planting a kiss on the fat buck-boi rim that winked with need and slobber. Mark's ass now plump and muscular, and just begging to be breed.
Angus huffed, the stag clambering awkwardly over the half-transformed deer-boi. His front hooves just above Mark's head, licking at the boy's hair. His thick stag cock tracing along Mark's taint.
Mark tugged at his nipple, letting go of his massive cock to grab Angus' even larger one. He lined it up with his ass, leaning up to kiss his former close friend's animal maw.
"Mmm, fuck my needy muscle ass!" Mark moaned into Angus' muzzle. The two kissing passionately as Angus' cock slipped past Mark's rim. Mark's face already starting to become a handsome buck maw from Angus' slobber.