Undertail Stories

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371 Stories

  • My Dream Is A Nightmare(NaJ!Nightmare × Abused nird reader) by Gasterfrisk2
    Gasterfrisk2
    • WpView
      Reads 53,651
    • WpPart
      Parts 26
    It's your first day and you had a black eye because of you dad. You where nerves for school because you where going to Underhigh. And you love sciance but what if that all changes when you meat the teacher of your dreams. I do not cuss and NO LEMMIN. *drink lemonade* dont get ideas. And also has appeasement so sorry Cover not mine. Art is not mine unless I say so. ON HOLD
  • Undertail Sin Pics by i_like_undertail
    i_like_undertail
    • WpView
      Reads 3,835
    • WpPart
      Parts 2
    13+
  • The Reset by FloweyTheGrouch
    FloweyTheGrouch
    • WpView
      Reads 129
    • WpPart
      Parts 5
    You're an orphan who was abandoned at a young age. You don't remember your parents. All you have is Penny. Or so you think. A certain skeleton keeps following you around and you're not sure how to feel about that. This is a sequel to "Not Quite Determined", so go read that first. Also a disclaimer: I do not own Undertale or its characters. They belong to Toby Fox.
  • I'm Pickin Up Good Vibratons~ (Undertale Sin One-Shot) by DoodleWritesAThing
    DoodleWritesAThing
    • WpView
      Reads 3,878
    • WpPart
      Parts 2
    Just a drabble :P This story will include 18+ content, if you're comfortable reading that then move along, but if you are younger than thirteen and still have not had 'the talk', you might want to skip this story.
  • Sanscest One-Shots :) by IPossum
    IPossum
    • WpView
      Reads 221
    • WpPart
      Parts 3
    Loading . . . [!] Reading . . . [] The title explains this really well. Only Sanscest. The cover art is my trashy art. This will show my progress of writing. I will gladly take criticism, it can better my work. But if people have the need to say something else about my work. Please avoid my account. I do not like arguments, both virtual and reality. Warning and announcements will be in the book. My progress will obviously be slow. I can take request but no Smut requests. I do that on my own. [] Done . . . [!] Closing . . .
  • Forever mine- sans x nagito by jankofazulka
    jankofazulka
    • WpView
      Reads 432
    • WpPart
      Parts 5
    Nagito trying to get his true love back. --------------------- My and my friend were at school when we wrote this.
  • Undertail AU's x readers Lemons~ by MacenzieRichtmyer
    MacenzieRichtmyer
    • WpView
      Reads 35,337
    • WpPart
      Parts 5
    It will contain different AU's of lemons and different thing it will be vary sexy!
  • Sanscest [Smut/Fluff] by FreshestFresh
    FreshestFresh
    • WpView
      Reads 4,391
    • WpPart
      Parts 2
    The title says it all. Requests? I'm better at fluff rather that smut. If there's a certain theme you want, then just say the ship and the theme. No Sans' OC's. Don't be shy if you don't like something, I'll take it as constructive criticism. I hope you enjoy reading my books! :)
  • Undertale One Shots (ON HOLD) by ShutTheFuckOff
    ShutTheFuckOff
    • WpView
      Reads 23,317
    • WpPart
      Parts 7
    Smutty or not I don't care. Please request I just want to write whether it's about fucking the flower, sucking off the skeletons, making out with Mettaton, or even falling for Frisk. Whatever character you want me to write and it can be X reader or a ship. You want fontcest? I'll write fontcest. Requests are open.
  • Flowey Reacts To The Undertale Community by Helluva-Weirdos
    Helluva-Weirdos
    • WpView
      Reads 13,062
    • WpPart
      Parts 9
    Yep, art not by me by the way, there will be inappropriate references in here
  • Who are we (error x blueberry ) by Somethingcute16
    Somethingcute16
    • WpView
      Reads 47
    • WpPart
      Parts 2
    This is a tester story the cover is mine
  • PromiseTale by Agnistpr
    Agnistpr
    • WpView
      Reads 6
    • WpPart
      Parts 1
    whelp, I finally had the BRAVERY to post my created AU! hopefully all of you have PATIENCE to wait for each chapters.This fanfic would be filled with KINDNESS,INTEGRITY,JUSTICE and PERSERVERANCE! so enjoy! Prologue Frisk ended up in the Underground.After freeing the monsters in the Underground, Frisk decided for another ending. "But what would happen if everyone is DEAD?"Frisk said. Out of curiosity, Frisk did RESET and killed almost all the monsters.. Only ones left are Flowey, Sans, And Asgore. But, Why does he feel somethings not going well.Frisk check his stats. LV19! and equipped with True Knife and Heart Locket. Frisk walked down the corridor, and. (End of Prologue)
  • Not What They Seem {Undersoul X Reader}  by Dings95
    Dings95
    • WpView
      Reads 305
    • WpPart
      Parts 11
    [Formerly Rated #89 in the napstablook tag!]"Ah! You're finally awake!" said a loud squeaky voice. " Huh..? Where..?" You say looking around. "Down here idiot!" said the voice slightly irritated. You look down and see a flower smiling at you. "See there you got it!" says the flower pausing "You seem to have a locket those things aren't what they seem down here," says the flower disappearing in the ground. {Undersoul by Raac24, Story by Dings95 (Me!) }
  • Undertale one-shots by awfelldude
    awfelldude
    • WpView
      Reads 1,033
    • WpPart
      Parts 2
    Just some random drabbles. I will take requests, but I won't be doing any frans or character x reader/oc. But I will do almost any other ship, so just request what you want. Working on a cover with my own art, but this will have to due for now. Cover art by: symphysins
  • Truth or Dare: Error and Fresh!!!! by moonfluffle
    moonfluffle
    • WpView
      Reads 9,430
    • WpPart
      Parts 5
    This will probably and hopefully have Errorfresh in it!! Ask them anything you like!! :D
  • The Story of the Mantis Shrimp and the Lobster by dontaskdonttell1
    dontaskdonttell1
    • WpView
      Reads 245
    • WpPart
      Parts 2
    Have you ever heard the story of the Mantis Shrimp and the Lobster?
  • The fallen children by Nightblissyt
    Nightblissyt
    • WpView
      Reads 280
    • WpPart
      Parts 4
    Yo guys this is my first undertail book it's a Fisk x reader book so yeah but before that should I do a boy frisk or girl frisk or a they frisk they meaning she/he Frisk ok bye!!!
  • Smile for me  by bluefast13
    bluefast13
    • WpView
      Reads 51
    • WpPart
      Parts 2
    Izuku and Ochoa are a couple but Urakaka was killed by unknown means as he couldn't stop seeing her face he even heard her talking To him As his eyes were changing to a purple and red He was still smiling through as he looked crazy Urakaka was alive and well but the ghost hunting Izuku was her Urakaka was given the chance to see him again and make him less crazy This is like a reboot to my dust hero book
  • Ask drop! by not_notacreepypasta
    not_notacreepypasta
    • WpView
      Reads 1
    • WpPart
      Parts 1
    drop is another typical inkerror child,it resides in the void with none. Ask it questions. see how it responds
  • Still Scared? // Underfell! Sans X Reader by SuenoAzzy
    SuenoAzzy
    • WpView
      Reads 400
    • WpPart
      Parts 5
    Young (y/n) is climbing with her best friend on mount Ebott, to discover a world that changes there lives!