Underswapsans Stories

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248 Stories

  • A Miscalculation In Space by Readern111
    Readern111
    • WpView
      Reads 20,300
    • WpPart
      Parts 20
    He knows he'll be dooming them if he falls, but he's tired, his body is breaking apart, held together on a higher being's whim only. He wonders if there'll be another to replace him. He wonders if there will be none. It's rather silly, really, since he won't even be around to witness that. The crowd, the rage and bloodthirst palpable in the air will ensure that. If he does not fall on his own, others will force him to. Or, in other words, the typical start of Error being forced to jump into the Void one way or another, in this case into the NaJ universe! The cover art belongs to irodimmatcha on deviantart(will take down if the artist asks me to)! Updates will be highly inconsistent. Edit: Now cross posted on Ao3 under the same username!
    +20 more
  • Soulmate With A Muslim [Nightmare Sans x Muslim Reader] by forcedef
    forcedef
    • WpView
      Reads 2,310
    • WpPart
      Parts 11
    I'm a simp for him and not many people make an x Muslim Reader.Since I'm aalso a muslim myself,so I make my own story.Anyway enjoy I gues. =D
  • Hold my Hand and Remind me I'm Real by Crookedwingedangle
    Crookedwingedangle
    • WpView
      Reads 58
    • WpPart
      Parts 5
    The idol group Blushing bones is super famous and somehow miraculously you ended up dating one of the idols. At least it feels miraculous at first, but the longer you're with Blue, the more it feels like something is wrong.
  • Be My Light~ by DustySpice
    DustySpice
    • WpView
      Reads 4,694
    • WpPart
      Parts 19
    This is Crink Cross X Ink story. Ink had kept getting letters from a "secret admirer" and after a while he found out who it was Cross! but the two knew that if either one of there teams found out they would be in huge trouble but they were eble to keep it a secret, Or Can They? Swear/Sin Waring.
  • Sans Boyfriend senarios (multiple aus)[undertale] by Virus_the_error
    Virus_the_error
    • WpView
      Reads 6,774
    • WpPart
      Parts 7
    This is a senario book including : Undertale Sans, Underfell Sans, Underswap sans, Gaster! Sans, Outertale Sans, Ink! Sans, Error Sans and last but not least Fresh Sans! There is probably going to be some profanity. Comment about any sans you want added and I might add them! (also located on my quotev)
  • Ask and/or Dare the AU Sans [OLD] by Cookiestar16
    Cookiestar16
    • WpView
      Reads 6,645
    • WpPart
      Parts 52
    [This is really old so... please don't judge me if the beginning parts sound a bit cringe or all over the place..!] Basically, you comment down in the comments either a question to one or all of the Sans or you can dare them. PM me if you want to be in my story!
  • Edgeberry {DISCONTINUED} by MiniSempaiCuteness
    MiniSempaiCuteness
    • WpView
      Reads 9,100
    • WpPart
      Parts 7
    so hey this story is discontinued im not in the Undertale fandom anymore anyways feel free to continue it by yourself like copy paste it and continue it idk
  • Crossy! by bullymacdonald
    bullymacdonald
    • WpView
      Reads 120
    • WpPart
      Parts 4
    Watch an adorable fluffi boi and his adventures in this book filled with nothing but fluff. the ships featured in this book are made of reinforced steel, provided by Rekitralf Incorporated. First entry in the SLO (Skittle Literary Omniverse) Written by Me Produced by Me Directed by Me Created by Me Me created by Mom and Dad Mom created by Grandma and Grandpa Dad created by other Grandma and other Grandpa Cover Art by Clichely Characters by *inhales*
  • "When Are You Coming Home?" by KrossOver404
    KrossOver404
    • WpView
      Reads 4,042
    • WpPart
      Parts 3
    Error- The God of Destruction His job was misunderstood. He destroyed to keep the balance, but soon, with all the hate he got, Error just quit. Ink- The God of Creation His job was loved. He created worlds and brought life to new people. He was loved by all, and wouldn't ever trade away his life. But... One day, Error didn't show up to stop Ink from creating a new AU. Ink, not really interested in what possible thing Error was 'planning', didn't mind it. Then everything started to get worse... Ink called out his friends, Dream and Blue. Ink liked Dream on the team because he was the brother to Nightmare. Ink likes having Blue since he was very good at spotting the weaknesses of their enemies, especially Error. Blue was kidnapped by Error. Ink took him away, and every time him and Error fought, the question 'Why did you take him?' came up. Ink questioned Error this every time they saw one another. Error claimed he wanted someone other than a puppet to talk to. Ink knew Error never hurt Blue - which he found strange - but rather he took care of him. Error asked Ink the same question. Ink merely replies with 'You'll hurt him, psycho, so I brought him home.' Then... They found him, or rather... What was left of him... Ink was shocked. Dream was scared. Blue was devastated. The AUs were ecstatic. But then... Everything started going downhill. Ink realized why Error did what he did. Dream left. Blue went into depression. A murderer, psycho, selfish... Error knew he was all of these things and more, but the one thing he wished he had heard from someone, was friend. A friend of Error's, maybe the only one, had stollen Error's jacket and cherished it, waiting for him to return. "When Are You Coming Home?" They would ask as they stared up at the stars, never to realize that the one they were looking for was gone, and never returning.
  • b--l-u-e-b/e/r/r//y by PikoUtataneV3
    PikoUtataneV3
    • WpView
      Reads 333
    • WpPart
      Parts 1
    Sans might be free from Error, but that certainly doesn't mean he's happy. Post-Errortale, Swap!Sans escapes from Error and his timeline goes back to normal, but now Sans has to live with the lifelong trauma Error gave him and readjust himself back into society. It's going to be very hard, especially since he appears to be the only one who remembers the incident. Errortale is by loverofpiggies. Just a one-shot, sorry! I might continue it. Maybe not.
  • You're pretty Fang-tastic ~High school Sans AU's X lupine reader~ (discontinued) by DragonOkami951
    DragonOkami951
    • WpView
      Reads 3,226
    • WpPart
      Parts 5
    (Y/n) has always been different, but not in the different you're probably thinking. She's half human half monster. Half wolf to be exact. Her ears and tail are big red flags to the beast in her blood. Thank god she has the ability to hide them! The girl's parents were killed when she was a babe, but they saved her in the process. People used to chase her down to try and experiment on her or throw her in the underground. That all is avoided now for she found herself a foster mother. In school she takes precaution not to get close to anyone, only acquaintances allowed. But now, all monsters have been freed from the underground! They take refuge on the surface and go to her school. What happens when the ambassador, Frisk and a certain group of skeletons befriend her? Being around her they start to notice key things about Y/n's person and get suspicious. Most importantly, some begin to gain feelings for the girl. What lengths is she willing to go to keep her true self a secret? And with all this attention, how long before the others discover it? I guess you'll just have to find out. Undertale belongs to the annoying do- I mean Toby Fox All of the AUs belong to their lovely creators Of course you belong to the wonderful you!
  • UnderSwap'SansXReader! by SansyReditXP
    SansyReditXP
    • WpView
      Reads 16,952
    • WpPart
      Parts 22
    Hello People! This is my first Fanfiction and Please Do not Judge me :> be good alright? "All of your Save Files Have been Wrecked,now you start to a New world.. Will you Continue to go back? Or Stay the one you Love? The Art Was by Me :> The character doesn't belong to me The original character belong to 'TobyFox
  • You Are My Sunshine by iheartallmight
    iheartallmight
    • WpView
      Reads 22
    • WpPart
      Parts 1
    "Please don't take my sunshine away."
  • Buttontale by sansymewmew
    sansymewmew
    • WpView
      Reads 47
    • WpPart
      Parts 2
    Blue finds a door in the wall in his new home. What secrets lie inside?
  • Time Stops For No One by Magyka13
    Magyka13
    • WpView
      Reads 12
    • WpPart
      Parts 1
    So, I did a thing...it's rly sad i almsot cried typing it. edit: I lied I actually cry every time Runix is essentially immortal.
  • More than one by profi12
    profi12
    • WpView
      Reads 8
    • WpPart
      Parts 1
    This is just some stupid ideas
  • Dreamtale: Regrow  by xgoops
    xgoops
    • WpView
      Reads 334
    • WpPart
      Parts 2
    Dream is tired. Awfully tired of fighting his very own brother day after day. He wants to find a different solution. Something else he can do. "If I can't find a way to save my brother without causing him harm, how dare I call myself a guardian...!", those thoughts have been racing through his head. After a short talk with his trusted allies, he decides to set-out on a journey: Perhaps those new universes and experiences will eventually deem helpful in saving his brother.
  • Bone-afide Secrets A Underswap Papyrus x Reader Fanfiction by CozzyTuxKitty
    CozzyTuxKitty
    • WpView
      Reads 14,093
    • WpPart
      Parts 13
    [Underswap Papyrus x reader] You have a secret. You are the last of your kind, shapeshifter / Human hybrid. The very culmination of your being constantly pleads for you to be honest about who you are, but your kinds law prevents you from doing so. Will you be honest and open about your powers with your new friends, or will you continue to lie and hide in the dark? (Yes the title is a pun, if you aren't aware bonafide means honest/ trustworthy, yes the title contradicts itself it's supposed to show the struggle between logic and emotion.)
  • Dustberry|Complicated love by lisamarie200
    lisamarie200
    • WpView
      Reads 83
    • WpPart
      Parts 1
    This actually came to my mind lol so I'm not sure if it's any good but eh- Blueberry wakes up one day and he hears a voice asking him to go outside and explore the portal that has opened up he heads outside to discover the portal being the curious bean he was he goes through the portal only to discover that there is a sans exactly like him but he's killing off innocent monsters. Blue tries to turn back before it's too late but the portal closes and blue is left all alone with a killer. The two begin to bond overtime dust constantly flirts with blue at times and he starts to get a bit possessive at times blue on the otherhand doesn't know how to react due to dust constantly flirting with him but as time goes on he starts developing feelings for dust but it's not the kind of puppy love you'd expect it's something much more than that it's the type of love they'd call lovesick. (There's lemon in this story if you don't like it then don't read it)
  • Little Blue Riding Hood (FONTCEST) by BooperDooper531
    BooperDooper531
    • WpView
      Reads 1,507
    • WpPart
      Parts 2
    Underswap Fontcest Little Blue Riding Hood: underswap Sans Wolf: Underswap sans Grandfather: Gaster Huntsmen: Alphys Mother of Little Blue Riding Hood: Undyne