A Boy and His Hand (Star vs The Forces of Evil Quest NSFW)

>Adventuring had given Anon many gifts that life had deemed fit to deny him
>A real mother who loved him
>The power to stand up for himself and those he loved
>Dolla bills, yall
>And many things he never would have even dreamed of
>Among them being his ever-present, murderous as fuck monster arm
>Muscles
>A beast whose lust for violence was matched only by its lust for booty
>And also sum tiddies
>Butt mostly booty
>A:"Heh, "butt"".
>Anon raised his hand up, expecting a returning high-five from his weapon of choice as he looked himself over in the bedroom mirror
>But there was no returning five
>Staring at his untouched palm, Anon came to the dawning realization that he had, in fact, been left hanging
>A:'Impossible'
>He glanced down at his blood brother
>Muscles lagged behind him, "staring" intensely at something behind the boy
>Well, as intensely as something without eyes can stare, anyways
>Anon turned to look over his shoulder, but no matter where he faced, Muscles was always behind him
>A:'What the heck?'
>Briefly, he exerted his WILL over the flesh construct
>But there was no reponse
>Muscles had disobeyed Anon before, but ever since he'd gotten stronger, it had been trivial to control the five-fingered freak's actions
>But now...
>Focusing on the link between them, Anon read Muscle's soul, its WILL
>The response he got wasn't exactly what he'd expected
>Lust
>Desire
>Booty
>Unnoticed by Anon, but not by Muscles, all the fighting and running had changed the boy's once soft, scrawny body
>Where fat had laid dormant, now signs of muscles made themselves known
>What had once been untouched, now had definition
>And where once there had been no ass of note, now was something worthy of appreciating
>Not Marco-tier, the arm would voice if it could
>But something worth...
>Touching
>And so Muscles began its dark work
>'SHRRRP!'
>Pants, boxers, any obstruction was torn away in an instant by Muscle's ravenous claws, exposing Anon's bouncy cheeks to the open air
>All the while, Anon struggled feebly, his strength without Muscle's obdeience greatly reduced, falling back on twisting and curling to try and shy away from something he'd seen happen all too often
>A:"H-Hey! No! Bad constuct! H-ACK!"
>But Muscles was having none of it, forcing his master onto the bed, leaving behind the tattered remains of his clothes and flipping him onto his stomach
>It was nothing personal, Muscles loved his master dearly
>But this was something that simply had to happen
>Muscles needed to have dat ass
>Rough claw-like nails gripped and scratched each pale globe, exploring the previously untouched landscape with the practiced taste of a connoisseur
>Not flattened slabs of steel like the princess
>Not as generous and overwhelming like the horned woman
>More muscled than all the girls at school
>And unlike the golden brown of the Marco boy
>To Muscles, his master's ass was something new entirely
>A blend he hadn't tasted before
>A blend that needed to be... explored more thoroughly
>Idly, the rebelious hand reared back to spank Anon's ass, observing how they reddened and rippled
>Anon could do little more but grit his teeth and bare it, the cheeks on his face mirroring the rosy hue on his ass as he flushed with humiliation and embarrassment
>He just had to ride it out, and bury any feeling the this brough out
>Glaring, he turned back to Muscles, though he knew the hand wouldn't listen
>A:"This better not awaken anything in me..."
>Muscles, of course, didn't give a fuck, continuing to spank and grope as he pleased
>His unwilling subject just bit a pillow and tried to tune everything out, including an uncomfortable stiffening as each impact ground his prick against the bedsheets
>Steadily, the strikes lessened, until Anon dared to hope that this whole fucked up situation was over
>Blinking away tears, he dared to look back, only to come to the horrifying realization of just why his arm had stopped its assault
>Behind him Muscles loomed, his shaped twisted and warped, no longer resembling a monstrous arm, but something more akin to a tentacle
>He'd seen enough hentai to know where this was going, and Muscles knew enough to know where it was going
>A:"OhnonononoN-OH!"
>The serpentine limb slipped past his unprepared ring, sinking deeper into Anon's tight, virgin passage
>Was this what it had done to Janna?
>How did she think th-this felt good?
>The filling, probing, squirming tendril, curling and pulsing and pushing deeper
>I-It was gross!
>At least, that's what Anon told himself until Muscles passed over a particular spot, making him gasp and squirm
>Noting the reaction, the hand homunculous endeavored to eplore that spot more thoroughly, grinding and rolling, rubbing against it at varying frequencies
>Any swears Anon had were quickly beaten out by helpless whining as his fingers dug into the bedsheets and his face buried itself into the cool fluff of his pillow
>With each push and roil from Muscles, another drop of pre leaks from Anon's cock, forming soft trickle that stained his sheets
>Growing bored, Muscles took shape after shape, experimenting with each to tease a new reaction from its master, some natural, some decidedly not
>In the end, it was something not dissimilar from Anon's own cock, with some nubs and ridges and an impossible motion that pushed the boy over the edge, forcing him to experience orgasm without ever once touching his cock
>A: "Ah... hah..."
>Shakily raising himself up, Anon lifted his panting face, grinning
>Even like this, he couldn't help but be an asshole
>A: "That... all you... got?"
>Muscles pondered that for a moment, still plunged deep in his wielder's stretched and stuff asshole
>Was this it, it pondered? Was this all it could do?
>...
>No, it decided.
>And thus the vibrating began.
>Anon didn't walk for several days.
>It took even more for him to get the feeling back.
>A: "Worth it."
>The pair high-fived.