Underswapsans Stories

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248 Stories

  • A Miscalculation In Space by Readern111
    Readern111
    • WpView
      Reads 20,412
    • 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!
  • 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
  • Sans Boyfriend senarios (multiple aus)[undertale] by Virus_the_error
    Virus_the_error
    • WpView
      Reads 6,775
    • 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!
  • β™‘Insomniaβ™‘ by trashy_name
    trashy_name
    • WpView
      Reads 53,641
    • WpPart
      Parts 23
    Picture not mine credit to artist! This story is about Dream who never knew anything about Error but when they spend time together and over come obstacles, maybe just maybe they can be more than friends... This is my first story so it's full of cringe
  • Fanart of "A Trio of Misfits" by JulieRagsdale1
    JulieRagsdale1
    • WpView
      Reads 664
    • WpPart
      Parts 2
    This is from a great fanfiction called "A Trio of Misfits" from Sabinarius. It's a really great story and if you haven't read it, I strongly suggest you do. I don't own anything. Not the story. Not the characters. Just the art.
  • Blueberry and UF ask box by MegTheSkellypie
    MegTheSkellypie
    • WpView
      Reads 8
    • WpPart
      Parts 1
    Blue- Hello humans! Say hi Fell! UF- Nu Blue- STOP BEING KAWAII AND SAY HI UF- hi. Blue- Okie Blue- We'll be doing an ask box! UF- More like ass-box.. Blue- SHUT THE TEMMIE UP FELL UF- Okay okay Blue- Feel free to ask questions and we'll answer a lot of em! UF- Yay now is this over yet Blue- Yea, I think. Blue- Wait one more thing UF- FOR CRYIN OUT LOUD WHAT Blue- Ship questions allowed 😏 UF- Seriously blue. You just had to do that. UF- You just had to get the people started in talking about us. Blue- IVE SEEN FANFIC NOW LETS GO UF- Finally Blue and UF- Bye!
  • A little bit of dust (UFSans/USPapyrus) by NespressoGod
    NespressoGod
    • WpView
      Reads 21
    • WpPart
      Parts 3
    Underfell Sans is once again finding himself fighting Frisk, and as usual loses and dusts. But this time he wakes up seconds later and blames it on a dream...Until he sees something weird. Story is also posted on my ArchiveOfOurOwn account- NespressoGod. That account will be getting updates an entire DAY before my Wattpad account, so go follow it for the day early bonus!
  • Stupid Writing Ideas by SwapSans_Addict
    SwapSans_Addict
    • WpView
      Reads 347
    • WpPart
      Parts 3
    Shit I can't get outta my head, and I need a place to dump 'em (also an excuse to post my drawings) (Centered around Blueberry Sans)
  • ASK BLUEBERRY! by RoseSinnerGalaxy
    RoseSinnerGalaxy
    • WpView
      Reads 74
    • WpPart
      Parts 2
    Q And A for blueberry!
  • A Brother's Bond by TwilightDragon5
    TwilightDragon5
    • WpView
      Reads 69,121
    • WpPart
      Parts 26
    It's been a few years since the events of Dreamtale. Dream is forced to constantly protect everyone's happiness against his brother Nightmare, and it seems nothing can stop him. However, when Dream finds out something that could save his brother, he jumps at the opportunity. Can Dream get his brother back, or will Nightmare fully succumb to the madness? Dreamtale, Dream, and Nightmare belong to Joku.
  • More Than I Should [A US!Sans x Female Reader] by _OneBeanHalfABrain_
    _OneBeanHalfABrain_
    • WpView
      Reads 100
    • WpPart
      Parts 3
    A human... An infant... Left in a tattered basket... Left crying in a cushion of golden flowers... Left only with a blanket and a locket bearing her name... (Y/n)... Raised by Asgore, spending her life in the ruins... She was bound to made many wonderful new friends... But... What if one... Is no ordinary friend? ... |{A/n: This book (at least the first few chapters) was slightly inspired by EightTheKat's comic 'The Seventh Soul'. Unless specified by me, none of the art contained is mine. Undertale belongs to Toby Fox. Underswap belongs to Popcorn Pr1nce (i think). Also the first couple reads are probably from me rereading this cuz I do that XD Also, updates will be slow, so I apologize in advance.}|
  • the flower room by kibawolfy13
    kibawolfy13
    • WpView
      Reads 32,586
    • WpPart
      Parts 9
    What will happen when ink plans with the other sanses to create an AU that will kill error if he destroys it and error doesn't act as planned? What will they find out about the destroyer? Find out in this story! (potentially errormare) I'll change the cover when i finish drawing it. I'm really sorry, I suck at descriptions. This is sort of a side project so don,t expect to much. i've fallen into the void that is the Undertale fandom. Forgive me. -nathaniel
  • Frisk In Underswap by CuteLittleItalian6
    CuteLittleItalian6
    • WpView
      Reads 5,387
    • WpPart
      Parts 5
    What happens when a shortcut goes wrong and Frisk ends up in another universe? Will she be safe and more importantly will she get back home? Read and find out! (This story is based off a RP me and my friend Icey did together on Shamchat so I had to transfer it from script form to lit, I hope it isn't to terribly written.)
  • 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.
  • Mythical Mimicry by Clichely
    Clichely
    • WpView
      Reads 156
    • WpPart
      Parts 4
    Shattered had ruled over his multiverse for ages, having long since plunged the world into a neverending pool of toxic positivity that fed him well. But one day, he was betrayed-overthrown, imprisoned, and banished to a different multiverse, never to return. Well, that was fine! He could just make a new empire! He- Wait, he just..did he just stab his counterpart- Oh. Oh, shoot, he'd just killed this world's Dream. These characters are not mine!
  • AU Sanses x Reader Oneshots/short stories by Cherry-Poppins
    Cherry-Poppins
    • WpView
      Reads 4,065
    • WpPart
      Parts 9
    Just a bunch of oneshots and short stories that I've thought of that I never could make into full stories... Feel free to suggest ideas and stuff. STAY DETERMINED!!!
  • Chaotic Times for a Chaotic Duo by Tigercoolyeet
    Tigercoolyeet
    • WpView
      Reads 99
    • WpPart
      Parts 1
    In which Error and Blue have had enough of The Council's bullshit and get payback. In other words, two grown men acting like children and trashing their rivals' big, grand-ass castle for the funsies. The cover image is just something random and it isn't correlated at all with the story adebiudew
  • Starry-Eyed (Undertale) by DragonzRawesomE
    DragonzRawesomE
    • WpView
      Reads 910
    • WpPart
      Parts 12
    {DISCONTINUED} The monsters have been on the surface for nearly five years now, and Frisk has grown into a young-adult. Chara and Asriel have been restored, and humans are finally beginning to accept monsters for what they are. Only, there is a problem: there has been a leak in the timespace-continuum, causing AU characters from all over the multiverse to seep into Frisk's universe. And not all of them have good intentions. Join Frisk on her hard journey to find where her true loyalties lie, in a dystopian world where you never know who you can trust. Will Frisk rise up to save the monsters and humans yet again? Or will the times of darkness finally prove to be too much for her Determination to handle? DISCLAIMER: UNDERTALE is owned by Toby Fox. All AUs belong to their respective owners. COVER IMAGE edited by me. I do not own the original image. PLOT/STORYLINE belongs to me. The events in this story are not canon and are simply for the entertainment of myself and my readers. Please do not steal. Thanks!!
  • The next generation. (Sequel of Ink x Reader and Error x Reader) by Featherclaw78
    Featherclaw78
    • WpView
      Reads 1,048
    • WpPart
      Parts 6
    When a certain black, dripping skeleton that is fused with Nightmares and darkness, finds a female skeleton that is asleep, he decides to capture her, when realizing that she's the daughter of the once all mighty and destructive Error. With the reformed Error thinking fast and also loving his daughter and also with the thought of his friend's daughter in the possible grip of Nightmare, he decided to make a deal with the nighty foe. To make it so that when either of the girls say I love you to a Sans, then they get the right to marry her. Error thought that Nightmare would like this, because of competition and love, and to his surprise, Nightmare agreed. Thus, making the story of this book. Note: Since this is a sequel, it would make more sense if you read the first book, called "Maybe a dream come true, or your worst nightmare. (Ink x Reader and Error x Reader)". You could read this one first, but it would be confusing, since you have no idea how Ink and Y/N got together, and who the heck Pastel is, or Cheshire.