Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/7780708.
  Rating:
      Explicit
  Archive Warning:
      Underage
  Category:
      Other
  Fandom:
      Undertale_(Video_Game)
  Relationship:
      Sans_(Undertale)/Reader
  Character:
      Sans_(Undertale), Papyrus_(Undertale), W._D._Gaster
  Additional Tags:
      Alternate_Universe_-_High_School, High_School, Consensual_Underage_Sex,
      Hermaphrodite_Reader, Futanari, sub!sans, Ecto-Tongue_(Undertale), Ecto-
      Vagina_(Undertale), Sensitive_bones, Implied_Bullying, Intersex,
      Emotional_Hurt/Comfort, Fluff_and_Hurt/Comfort, Established_Relationship,
      Referenced_depression, Masturbation, Rock_and_Roll, Song_Lyrics
  Stats:
      Published: 2016-08-15 Words: 2640
****** A Different Kind of Release ******
by Nillas_NSFW_Corner_(Agraulis_vanillae)
Summary
     Not everyone's as understanding as him, but it doesn't mean that
     you're not nervous for your first time. But then, you really hadn't
     factored in how much he thinks of you too.
Notes
See the end of the work for notes
You could hear your blood rushing through your head in pulses, a thickness
settling at the back of your throat. For a second, you almost tune out the
doctor, but a hand seizes your arm and shakes you to attention.
“Did you hear him? What do you want to do?” your mother asks. Your siblings
weren't here, but neither were your father. You were in the office after
school, still in your high school uniform. This didn't seem particularly fair
that they were trying to force you to make a decision when you're still dressed
in your skirt and blouse. Like they were trying to preemptively force you to
one side of the gender dichotomy.
You chewed on your bottom lip, tasting how raw and chapped it was from weeks of
chewing it in paralyzed frustration and raw fear. You weren't looking forward
to the day you had to declare whether or not you were going through intersex
surgery. Because you made up your mind from day one and...
...they weren't going to like the answer.
“Y-yes... I'm...” you gulped. “I'm not g-going to do it.”
“Excuse me?” your mother asked, in that tone of pure disbelief, tinged with a
little outrage. A part of you cringed at the thought that she'd consider it a
reasonable course of action to chop off a part of yourself just to normalize.
“I'm not going to do it.” you repeated, your voice unwavering this time.
~
“Ew, so you're a hermaphrodite? Like a tapeworm?”
...
“Could you... you know. Get yourself pregnant? Like you had a wet dream one
night, and boom! You're the mom AND the dad?”
…
“Should you even be in the girl's locker room? You have a dick, right? Oh but
you have a vag too... so maybe you shouldn't be in the boy's locker room
either. Can you just get dressed in the teacher's office or something?”
...
“i've never had both at the same time, but i can choose which i'd like to be.”
“Really?” you asked, the strange monster that sat next to you in school one
day. It would've been difficult for you to believe him, but you weren't going
to judge just because he was a skeleton. Not after the entire school passed
their collective judgment on you, with their rude and invasive questions. At
some point, the nickname 'Tapeworm' passed through the school, and despite your
very best attempts at a pokerface your classmates seem to be able to tell how
much it made you want to punch them in the face. They'd been getting steadily
worse.
He, for that seemed to be the pronoun he preferred, nodded. “yep, i can make
whichever form, though i've never tried makin' both.” And then he blushed. For
the first time, you found yourself enchanted. It was such a gentle reaction
compared to everyone in your life. It was a reaction from someone you could
love.
~
Against all expectations, Sans found himself in a relationship with a human.
You were kind, but not the type to back down. This had its perks and downsides,
as you occasionally showed up with suspect bruises. It was hard to tell if they
were coming from their classmates, or your family. You had siblings, so it
didn't have to be your parents but still... he wasn't sure he could imagine a
world without Papyrus or Gaster's unyielding support. Certainly not with one
HP. He probably would've offed himself by this time, prone to nearly unbearable
mental exhaustion that rendered him in bed for days at a time without his
youngest brother to practically carry him out of bed and his eldest brother
making a point for him to eat.
The perks to your headstrong nature? Well... aside from genuine admiration, he
would find himself daydreaming about that same aggressive energy directed
towards himself. At night, he would begin stroking the pubic symphysis, idly at
first. Imagining you on top, pinning him with his arms held back behind his
head with one arm, and rutting against him. Your face flushed, wearing that
rare confidence he could glimpse only when you were distanced from your home
and school. Maybe it was those rare moments when you sang along with a favorite
song, or just a little bit of your tongue sticking out in concentration even as
you knew you were winning a game.
He could feel his face heat up under an intense flush thinking of your tongue.
You were already so soft and warm, so what would it feel like for that same
heat to sink lower, flitting over ribs and pressing wet open-mouthed kisses to
his sternum before pressing your tongue to his-
Oh... his magic coalesced around his fingers, tight and throbbing, his palm
resting on the mound of newly formed vagina. He slid his digits out closer to
the entrance, only to squeak at the intensity of the feeling.
“ahhh, shit...”
The throbbing was painful, the stimulation of those two digits too fast, too
much still. He had to keep quiet, but he couldn't help a soft whine at the
slickness of his inner walls, his mind all too willing to substitute his
fingers for the slow probing of your tongue. He shifted his heels back
unconsciously to brace up against the mattress of his bed and before he
realized it he was slowly easing the thickness of those digits back in
regardless of the painful stretching.
How long could your tongue reach inside him? Could that wet muscle push up in
just the right places and writhe in all the right ways? It wouldn't be like
using his fingers now, pushed up rigidly before he cautiously giving an
experimental curl. Sans cringed as he'd pushed too roughly against the soft
yielding walls of his magic. He pulled out again, before he thought of you
hovering above him again. This time, you'd have glimmering traces of his
arousal against your soft lips, and only when you would be leaning up to kiss
him mouth to mouth would be when the answer became clear.
Your stiff arousal, yet with soft velvety skin, would press against his
entrance. With a barely restrained groan in the fragile silence in the dark,
he'd already pushed his digits all the way back in to the knuckle. It still
hurt vaguely, but he bucked hard up against it anyways. Greedy for a repeat
performance, he maintained his idea of your dick pushing in and sliding out
slicker, fucking him slowly and tried to repeat this image with another in-out
thrust his fingers. He wanted your warm flesh to press up firmly up flush with
his hips and the rutting of your hips to stimulate his clit. He wanted you to
grip the wide flare of his ilium and fix his hips in place, immobilizing him
completely as you would pick up the pace.
Harder.
Faster.
Deeper.
His hips was moving of their own accord now, pumping with an erratic
desperation. He could only bite into a pillow he held to his face last minute
with a tightening fist and-
- “hahhhh!! ah! ha!! ahhh... ha... ha..!”-
-he came with a flush of fluid drenching his hand and tears springing to his
eyes. He sobbed a few more seconds, overstimulated and gripping even as he
slowly extracted his hand. He stared at the liquid languidly dripping down his
palm in mute wonder. He was still processing his first waking orgasm in the
hazy afterglow when his magic dispelled. He rolled to his side, legs pressed
together and hugging the semi-wet and abused pillow to his cheek. Maybe he'll
be able to manifest both a dick and a vagina like you one day... and then you'd
fit together against him exactly, soulmates in body, mind, and spirit.
He hopes his first time with you will be amazing.
~
It wasn't even a week later, the sexual tension during classes each day
palpable. He wasn't sure that he wasn't imagining it, until late night after
school one day, locked up in his room and listening to rock music at a fairly
loud volume. You'd propped your legs up against the wall next to his bed,
softly banging your head, as your skirt gathered up to your thighs.
He couldn't help stealing nervous glances at the soft white cotton of your
panties, when he thought he could, whipping his head forward a little too
quickly when it seemed you'd turned from the book you were reading. You were
silently watching him in the corner of your eye, secretly nervous as well,
though you thought those furtive glances might be a good sign. You wiggled your
hips a little bit farther forward, your legs further up against the wall and
your skirt now leaving your underwear completely exposed.
The song shifted, and the hard rock beat suddenly had him grinning. Not the
fixed grin, like when confronted with his perpetually worried siblings, or the
other fixed grin that threatened to become a sneer when faced with the school
enemies that plagued both of you, but a private grin that softened up his
features and relaxed the sockets of his eyes.
“i'm so messed up,”
You suddenly scrambled upright, pushing your skirt down self-consciously, and
concerned about this unexpected statement. “Wha-”
“i want you here.”
You blinked, suddenly registering the subtle lilt of his words as well as the
song itself. He looked pleased at your sudden attention, and rolled on his
stomach with the textbook he was studying sliding off the bed with a sudden
thwump! that was drowned out by the heavy melody. “Oh, I get it. Jeez, don't
scare me like that...”
“in my room, i want you here.” he crawled over on his hands and knees to lean
his face close to yours from below. “and now we're gonna be, face to face.” He
nuzzled his teeth to your lips in a skele-kiss, his hands brushing up from your
knees, halting completely right as your skirt began to gather. You pushed your
mouth against his in a long lingering kiss, and holding his hands briefly, you
firmly pushed them up to grasp your hips. You stared at him expectantly, his
gaze hazy and his cheekbones flushed, and he barely catches up with the music
and recites the next line too quickly-
“i'll lay right down in my favorite place. heh, you know where that is... don't
ya?” he winked, even as he was sweating and blushing madly. The clumsy come
on's were the sweetest thing you'd ever seen. “and now i wanna. be. your. dog.”
You pushed him over to straddle him, and stopped, just starting to register
what you were doing. Before your own doubts could take a firm reign over your
actions, he pulled down your underwear to nuzzle at the slight erection you
were sporting. “no balls, huh?” he murmured thoughtfully.
Your breath hitched and in a rush of self-consciousness, “Technically, I could
have had them get rid of the dick part and basically be a regular girl bu-
ahh!” You slapped a hand to your traitorous mouth as he gripped the base of
your erection firmly and used the tongue you weren't aware of his summoning to
lap at your entrance.
“i lose my heart in the burning sand,” he murmured up to you, inaudible under
the cover of the music but you heard him anyway, looking down and seeing his
enraptured expression. Suddenly determined, you tugged his hoodie back from his
uniform and unbuttoned the collared shirt with shaking fingertips to expose
vulnerable snow-white ribs. He was panting, but hell so were you, both
trembling under the enormity and in anticipation of the event.
With unexpected consideration and gentleness, he'd inserted one finger into
your entrance. A slick squelch sounded as he pulled out and pushed back in
slowly that made you grimace expecting him to be disgusted, but Sans exhaled
with a low “ohhh gods...”
That was when you really began stroking his ribs with a fervor, stroking then
digging your nails in, and pushing. Trying to find a way to make him feel good,
as good as possible. You finally got a gasp when you gripped his spine, and
shimmied off his pants. You weren't entirely sure what to expect, when he
started up a low plea,
“oh please... please, please, please...”
But rubbing the thumb of your free hand against the inside of the tail-bone
made him halt in his actions, from pumping slowly across your shaft to the slow
stuttering of the finger he had thrusting in you. You drank in the way his
expression screwed up, eyes lidded and mouth open. You licked your lips and
leaned over to mouth at his tongue gingerly. You were caressing the inside of
his hipbone now, pushing down and then gripping at the flare of the hip only to
slide your hand inwards and pushing his pelvis down again. He moaned, suddenly
stopping what he was doing to hold your head and licking your lips for
entrance. You took his tongue in, sliding it against your tongue and feeling a
rising tension in your groin. You fumbled a little bit with his pelvis, trying
to find something that he'd really respond to.
You pinched the thinnest point between his hip bones firmly, the pubic
symphysis, and suddenly he was crying out and thrusting against your hand hard
and fast.
“ahhh-ah-ah! ohhhh ahh ha, haaa... ha... ah...”
You stared into his eyes with genuine surprise as tears leaked out the corners
of his eyes and spilled over, and took in the almost lost manner that he sobbed
lowly. He hadn't been able to move his hips much from the point you'd been
holding, but what movement there was given had stuttered to a slow stop, legs
twitching. You realized that somehow, even without the aid of ecto genitalia,
there was fluid dripping between your fingertips. You licked them thoughtfully,
a faint umami flavor permeating across your tongue, as Sans slowly recovered
from post-orgasmic glow.
He suddenly scrambled upright, mortified as he realized he came without even
forming anything to begin with. “oh my god, i'm so sorry, i didn't realize..! i
thought i'd last longer, i mean-” You threaded your fingers in between his, and
he stopped, unable to continue against his burning shame.
“Did you really just come without forming any sex organs?” you asked softly.
“y-yeah... i'm so sor-”
“No, no sorries.” you pulled his fingers to your lips, still smelling traces of
yourself on him. “I... kinda can't believe you'd do that. To me, I mean. For
me? Holy shit, I'm a poet when I'm trying to express myself...” you growled to
yourself. “You really got so messed up just for me. That's... amazing.”
Sans ducked his head, feeling your soft lips still swollen from kissing, and
still pressing against each individual finger bone, at a loss for what to say
for once. He wanted to go a little further, do a little more for his first
time. Unbelievably, you seemed happy though as you fell to the bed to cuddle
against him.
“don't you want me to finish you off?” he finally found the courage to ask, but
you shook your head against his chest minutely.
“Not now... I just need to soak in this feeling a little longer.” you murmured.
A half an hour later, when he was nearly asleep and the CD had finally reached
the end of it's cycle, he heard you softly tell yourself, “You want me.”
He never did forget about the happy disbelief in your voice, or the wetness of
your soft cheeks against his bones, or the way you clung to him harder when he
rubbed your shoulders gently. In some odd way, it seems he managed to give you
a different kind of release.
End Notes
     *sinks into a sin bin the size of the garbage depository from Star
     Wars*
     Thank Kyre for encouraging me to be a bigger perv than I ever thought
     possible <3 Haha!
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