Posted originally on the Archive_of_Our_Own at https://archiveofourown.org/
works/8210579.
  Rating:
      Explicit
  Archive Warning:
      Graphic_Depictions_Of_Violence, Major_Character_Death, Rape/Non-Con,
      Underage
  Category:
      M/M
  Fandom:
      Undertale_(Video_Game)
  Relationship:
      underfell!sans/underswap!sans, Underfell!Papyrus/Underfell!Sans,
      CherryBerry, Fellcest
  Character:
      Underswap!Sans, Underswap!Papyrus, underfell!papyrus, underfell!sans,
      Underfell!Undyne, ERROR!Sans_(mentioned), Will_add_more_later_-_Character
  Additional Tags:
      Non-con/dub-con, alcohol_use, cutting/chipping, Ectodick/Ectocock,
      Alternate_Universes, Alternate_Timelines, slow-burn_romance, Physical
      Abuse, Mental_Abuse, Emotional_Abuse, Suicide_mention, torture_scenes,
      Underfell!Papyrus_is_an_abusive_jackass_to_Underfell!Sans, Will_Add_More
      Later
  Stats:
      Published: 2016-10-04 Chapters: 1/? Words: 1360
****** Trauma ******
by MagnificentBlue
Summary
     [ Warnings Apply to Later Chapters ]
     Underswap!Sans learns from his time with ERROR in the anti-void that
     there are hundreds upon thousands of other timelines and alternate
     universes, some of which wherein he became a famous royal guardsman
     who was loved and treasured by all. Sans convinces his brother,
     Papyrus, to take him to visit some of these other universes and/or
     timelines, only problem is....their first destination was an
     accident, and a very unpleasant one at that.
Notes
     Thank you for reading my work! This is my very first fanfiction I
     have ever written, and I actually have the ENTIRE story planned out
     already! I've just taken a very long time to actually get this from
     shitposting outline to written work.
Timelines. It had to be timelines, why couldn’t his sweet little brother learn
about literally anything else aside from timelines? Stars, it was timelines and
alternate universes! Papyrus cursed the queen under his breath as he tried to
keep his cool in front of his excited little brother, Sans, whom was currently
bouncing up and down begging him if they could vacation to other universes. He
knew it was too good to be true when he’d been rescued from ERROR that thorn in
his side not only exposed his dear sweet little Sansy to the anti-void but he’d
told him everything about the other timelines and other versions of themselves.
“papyrus come onnn pllleeeaasseee?!! how am i going to know if i’m destined to
become captain of the royal guard if i don’t see other versions of me
succeeding as well?!!“ sans flashed only his most colorful and gleaming of
puppy-dog eyes, knowing his tall brother would be unable to resist their cute
charm, and he was correct as always “Fine, fine! We’ll go to another universe,
not like you haven’t been to the others before while you were with Error, I’m
sure, you may have not realized it brother but they aren’t that different from
our own, heh.” and with that, Papyrus scooped up Sans into his arms and shushed
the sniggering skeleton, who was overly pleased with himself at his brother’s
willingness “You’ll want to hold on tight, bro.” Papyrus chuckled as he fished
a box of cigarettes from the bottomless space that seemed to inhabit his
brightly colored sweatshirt, flicking out a single stick and clicking it
between his teeth, lighting it, and taking a drawn out and relaxed pull much to
Sans’ displeasure. “papyyy what did i tell you about smoking near me?! i know i
can’t get you to stop but you promised you wouldn’t get the smoke near me, it
smells bad!!” the petite skeleton frowned as much as his perma-grin would allow
him to, pounding his fists lightly against Papyrus’ sternum in a nagging-
loving-brotherly way despite the light coughs his chest gave him. “Nyeh, heh
heh sorry bro, part of the travel procedure, you know, rules and stuff, you
understand eh?” amused at his brother’s antics, Papyrus grins widely before
removing the cigarette from his mouth and snubbing the tip, returning it to his
pocket for later use when Sans wasn’t around to bully him out of it.  Before
the smaller skeleton could voice his protest, Papyrus pulled him close against
his torso, muffling the little trainee against his worn sweatshirt and with a
snap of his bony fingers, a shortcut was initiated.
 
“ Nyeh heh, you can open your eyes now Sans. You know we’re here, right? “
 
Sans hadn’t even realized anything had happened, much less that they had
already traveled, he peeled his face away from his brother’s sweatshirt and
blinked up at him in confusion, tilting his head to the side as he squinted his
eye sockets incredulously at his smug-faced brother  “what do you mean we’re
already here?! papy you’re lying to me there’s no way you just snapped us into
a whole other universe, i’m not some easy to trick babybones, i am the
magnificent sans and you should know that i am quite skilled at seeing through
such japes and –mmpf!!” sans was cut off when long, bony fingers slapped
lightly against his teeth, his brother had silenced him! Of all the rude
things--!! “Hush, bro, something’s wrong, tibia-honest I don’t think we’re in
SunnedOut anymore.” the taller skeleton spoke quietly, keeping his voice far
lower than it normally was as he murmured close to Sans’ skull urging him to be
quiet, something was indeed very, very wrong. Papyrus had meant to take Sans
into another timeline of their own universe wherein he was loved by all and
honored as the finest royal guard in history, but where they currently hid
amongst the trees, there was snow on the ground, and everything felt….dead.
Sans was still none the wiser to their situation, his senses blurred by his
exasperation with his brother’s strange behaviors and horrible joke, he didn’t
take the hint and pried his brother’s hands away from his teeth only to begin
shouting louder than he had before, not sensing the danger like his brother had
“PAPYRUS! YOU ARE BEING QUITE RUDE WHY ARE YOU MAKING JOKES AND FORCING MY
SILENCE?!” he yelled, echoing off the hollow trees in the forests.
 
Little did Sans know he’d just made a horrible mistake, for a Papyrus similar
to his own, but not quite his, had heard his name from within the forest form
what sounded like…another Sans? “HMM. . .HOW  CURIOUS,   PERHAPS  I  SHOULD
 INVESTIAGE. . . UNDYNE, THERE’S  SOMETHING  IN  THE  FOREST,  LET’S  HUNT  IT
 DOWN.” the captain of this universe’s royal guard sneered at his subordinate,
growing bored with watching Undyne suplex boulders simply because she could; he
was pleased they finally had a distraction from his boring routine of
babysitting these blithering fools, anything to avoid making up petty tasks to
keep the dog squad busy. It was always either that, or dragging his worthless
sibling out of taverns and throwing him back into his sentry post, the bag of
bones would be more useful as a toothpick some days. 
 
Papyrus immediately tried to silence his loud-mouther brother once more, only
this time more urgently, he could feel that someone had most definitely heard
him that time, and it wouldn’t be long until they encountered a hazard if this
universe was a dangerous one. “Sans, we need to go, right now, we can’t stay
here. We’re going home.” he tried to pick his miniscule brother back up once
more, but Sans thrashed and squirmed his way out of his brother’s arm and
protested to being held, crossing his arms across his chest plate and tapping
his foot impatiently “ PAPYRUS TELL ME WHERE WE ARE WHY ARE YOU TRYING TO MAKE
US LEAVE!!” Sans began yelling at him, insistent on being given a valid point
on why they had to get away from here so quickly when they’d just arrived, they
hadn’t even met anyon—  schlik,the sound of a weaponized spear slicing up
through the earth’s crust caused Sans to shriek in absolute horror as he
scrambled to step back, falling onto his coccyx with wide, surprised pupils
locking onto the spot he’d just been standing, where a large teal spear stood
erect. “heheh we FOUND you, you little SHITS!!!” the voice of what sounded like
Undyne to the skeleton brothers rang out across the clearing, startling them
both equally, there was no way that was their Undyne who was charging towards
them, shredded layers of armor scraping against each other with every step, the
sound was the sound of their fate being sealed with every passing second.
 
Papyrus only had time to push his brother harshly, urging him to get moving
before he had to face the assailing monster, throwing up a wall of bones to
deflect her jousting; “SANS, RUN!!!!!” the pure brute strength behind her
attacks cracking Papyrus’ defenses in a matter of seconds, something about the
way this version of Undyne fought reminded Papyrus of a far more merciless and
determined version of his Alphys back home. He needed his brother to be safe;
he needed Sans to get away from her. As if his body was controlled by another,
Sans found himself shakily coming to a stands before breaking into a sprint,
barreling through the forests and ducking beneath branches here and there, he
could feel his soul hammering in his ribs, would Papyrus be okay? Where were
they? Where was he even supposed to run to? Did his brother even know how to
fight why wasn’t he staying to help he was the one who had trained for moments
like these! Sans didn’t look back, he kept his eyes forward, narrowed in pure
focus on finding safety, as excellent an idea that was it left him unaware that
he was being trailed by a silent predator far more dangerous than Undyne had
been.
 
“NYEH  HEH  HEH, I  FOUND YOU,  LITTLE  BLUE. “
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