Underfell Stories

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1.2K Stories

  • Fell Sans x Reader  by Irregular_Galaxy
    Irregular_Galaxy
    • WpView
      Reads 1,282
    • WpPart
      Parts 15
    Uh i'm bored so here is a not so innocent story about love. you are 19 and he is 21 also you work at grillby's
  • My Edgy Wolf (Werewolf Uf Paps x reader) by NightmareWolf937
    NightmareWolf937
    • WpView
      Reads 6,200
    • WpPart
      Parts 35
    You are a 19 year old female. You also work at a Cafeteria even if you are rich. Your dad and mom are CEOS and earn a ton of money. You wanted to work even if you didn't have to. You stumble upon a creature, part skeleton part wolf. What will happen to you if you keep him? {Complete}
  • ʚ٭Swapfell| Fellswap|fell𝙖𝙣𝙙swap AUs: Imagines٭ɞ by LipGlossGossip
    LipGlossGossip
    • WpView
      Reads 1
    • WpPart
      Parts 1
    ʚ❸❸❸ɞ This has imagines|scenarios and mostly a reaction to different things like types of addiction\getting caught or just cute small things. Idk a bunch of random imagines I think of at night and also because I love the underfell AUs and the swap ones and my personally fav is swapfell gold which has barely any media expect the lore deep dives. so I just put a bunch in here but I am gonna do other ones after the exams which is after mayish for me and then finish some of these cuz some the angst in my drafts are like rlly good so yeahh Idk why I really wanna do bad san's imagines as well so il look into them before doing them as well ʚ❽❽❽ɞ
  • Marked in Red, Claimed in Gold (Mafiafell Sans x Reader) by clubofsnakes
    clubofsnakes
    • WpView
      Reads 385
    • WpPart
      Parts 8
    The skeleton shakes his head slightly, a boney hand sliding across his skull. "Ah- well- that wasn't free Doll, 'course you'll have to pay me for that..." He trails off, his cocky smirk ever present on his face as he looks you up and down for a mere second, "...little favor." He pinches his pointer finger and thumb together before rubbing them together. _____________________________________ (Y/N) is a bartender that was kept secret from the after hours patrons at the bar she worked at for two years. Her boss not wanting her to associate with the people that would further pull her into a world that she was scratching the surface of just by working there. But after staying just a few minutes later then she was supposed to she stands face to face with a gold toothed smartass with a devilish smirk- his red eyes trained on her every move. ______________________________________ There is cussing but let's be honest- there's cussing everywhere. Also posted on AO3 as clubofsnakes where additional chapters later on will appear there and not here. I was inspired by- @MissHoll-E-Socks with their story "Can I take you to dinner?" NONE of the art is mine.
  • 📉Fell Wallter VS Mafioso⬛ by LaHaiwanz
    LaHaiwanz
    • WpView
      Reads 138
    • WpPart
      Parts 13
    i guess im only giving picture credit. https://www.deviantart.com/emiraishere/art/Fell-wallter-and-mafioso-1302965315 ⚠ THERE ISN'T PROFESSIONAL LINGO HERE⚠ ->Mafioso is from forsaken -> Fell Wallter (Aka Wallace) is an underfell version of Wallter from Regretevator. idk what his is fyi in this story it's like 2022 and Wallace was born in 2006, while Mafioso was born in 2002. MikeBlox and Kasper were born 2007. This image depicts a fan art illustration featuring two characters, Fell Walter and Mafioso, from a narrative potentially related to mafia themes. The character on the left, Fell Walter, has a grey, cracked appearance and is wearing a red scarf. The character on the right, labeled as a mafioso, is wearing a black suit with a yellow collar or facial covering and is surrounded by floating green currency symbols. The art style is digital and stylized, focusing on character interaction within a thematic background.
  • Red Mask by SpiritWolfNura
    SpiritWolfNura
    • WpView
      Reads 230
    • WpPart
      Parts 7
    Underfell is a dark and dangerous place filled with murder in violence, and Sans and Papyrus are the pinochle of it all. So nobody would ever suspect Sans to come back after a lost bet. Maybe you haven't seen all of what's under Red's mask, huh? Request for Icecream_Shipper
  • Little Lyrebird(G!Sans x Reader) [DISCONTINUED] by xXDiabolicEnigmaXx
    xXDiabolicEnigmaXx
    • WpView
      Reads 74,652
    • WpPart
      Parts 29
    He created me to become the people's art. But he has only created the perfect weapon. (Cover drawing is not mine)
  • Lunar eclipse Dream x Reader (COMPLETED) by Kath1908
    Kath1908
    • WpView
      Reads 382
    • WpPart
      Parts 15
    (Y/N) (L/N) lived in Underfell when suddenly Nightmares gang shows up and wrecks part of town. (Y/N) happened to be there and tired to help. She ends up getting hurt but what happens after that? How will this change her life? Wouldn't you like yo read and find out? Book 1 of the Celestial Trilogy.
  • THE FALLEN SISTERS by fanfxc_wrxtez
    fanfxc_wrxtez
    • WpView
      Reads 422
    • WpPart
      Parts 14
    Ink and Error are having their usual fight when a girl falls from the surface. Imagine their surprise when another girl falls down. Clarisa and Moti get used to staying in the Void and begin to enjoy their time there. But different powers that even the sisters are unsure of begin to appear. Ink and Error feel obligated to investigate these mysterious forces, but will they unearth something that may be the end of them all? And will they confess their love for the wolfy pair?
  • 《Undertale au sanses x fem!reader》 by Skyler183_AnimeLover
    Skyler183_AnimeLover
    • WpView
      Reads 1,698
    • WpPart
      Parts 11
    (Cover not mine!) you are a monster of the underground and is a close friend of sans,you And sans meet when he visited your cafe and slowly became friends,and You met frisk who is such a kind child..and when the underground were Finally able to go at the surface everyone was overjoyed,but just after A few months frisk and sans had been acting strange and you figured out That there are aus! but... there is no different versions of you and you wonder why.and suddenly a Weird portal had opened and you had now met a skeleTON of sanses and Each one had fall for you like how your sans did Who will you choose? Read to find out..
  • Underfell Sans Diary by Underfell_Fan_AU
    Underfell_Fan_AU
    • WpView
      Reads 1,974
    • WpPart
      Parts 5
    I have a different book and this is basically what was happening before that book happened. So this is Sans's life before anything else happened.
  • UNDERTALE(Father's SECRET) by EyelessLover101
    EyelessLover101
    • WpView
      Reads 46
    • WpPart
      Parts 2
    During the years that Gaster was alive as a skeleton so to speak he had worked a secret project a project that ended in his death or the erasing of his existence his sons unknowingly come across this experiment and at the same time the first human to ever fall has fell who ever said Chara was the first.
  • If Only You Knew by FellSans
    FellSans
    • WpView
      Reads 7,389
    • WpPart
      Parts 10
    //Trigger Warning!// This is about the struggling brotherly relationship the Fell brothers are having. It consists of triggering topics, so please don't read if it triggers you in any way. Anyways- You don't have to read this lmao it's boring I know.
  • Crossed Unders in a Strip Club by Revharem
    Revharem
    • WpView
      Reads 245
    • WpPart
      Parts 4
    When characters from the different universes start crossing into other au's, what will be sparked. Warning, lots of story, yaoi, and some lemon. I can't change the Maturity, but if it isn't obvious, this is a Mature story, under 18, stay out!
  • 『𝐀 𝐆𝐮𝐚𝐫𝐝𝐢𝐚𝐧𝐬' 𝐌𝐨𝐭𝐡𝐞𝐫』⦉sᴀɴs ᴀᴜ x ᴍᴏᴍ!ʀᴇᴀᴅᴇʀ⦊ by Amber_toast
    Amber_toast
    • WpView
      Reads 245
    • WpPart
      Parts 3
    All she wanted to do was to settle down a bit with her children and live peacefully.... ...So why the hell did these skeletons and this woman appear in front of their house?! She already had to deal with the people in the village nearby and now 𝘵𝘩𝘪𝘴? And can anyone tell her why is her children's older selves here? Why the fuck is this woman pestering her? And why won't some of these damn skeletons mind their 𝘰𝘸𝘯 𝘧𝘶𝘤𝘬𝘪𝘯' 𝘣𝘶𝘴𝘪𝘯𝘦𝘴𝘴? ......The only good thing about all this is that she now has more children to spoil- ⦅𝚁𝚎-𝚠𝚛𝚒𝚝𝚎 𝚘𝚏 𝚖𝚢 𝚏𝚒𝚛𝚜𝚝 𝚋𝚘𝚘𝚔⦆ ⦅𝙼𝚘𝚟𝚎𝚍 𝚏𝚛𝚘𝚖 𝚖𝚢 𝚖𝚊𝚒𝚗 𝚊𝚌𝚌𝚘𝚞𝚗𝚝 𝚝𝚘 𝚑𝚎𝚛𝚎⦆ 〖ᴏɴ ʜᴏʟᴅ〗
  • When I Reset My Life by TheWorldOfUndertale
    TheWorldOfUndertale
    • WpView
      Reads 114
    • WpPart
      Parts 4
    When Fell and Original Frisk both have the urge to Reset, their plans don't goes as they expected, except something corrupted while they both reset at the SAME time. When the original Frisk realizes this, she begins to panic in fear, her (Yes, both of the Frisk's will be included as girls, sorry if you don't like that) mind begins to pound with questions. In the mean time, Fell Frisk have's her mind in complete confusion, her mind is spinning, her stomach is turning, she didn't know this could happen. From the Fell universe, she begins to show some of her negativity towards them and she soon thinks quickly and plays it off as a joke and acts up like their Frisk, but will she soon begin to warm up to them? Will they both become friends with the others from the different universe? But chances are, what if they both get to close to another?
  • Ketchup, Rainbows, and a Wonderfully Stupid Ship: Sans x Mabel ONESHOTS by PixaneFangurl510
    PixaneFangurl510
    • WpView
      Reads 1,484
    • WpPart
      Parts 7
    Welp, you guys asked for it, so here it is. Sans x Mabel Oneshots. Its been about one year since i started the "Underfalls" series, and to everyone who enjoyed it, a lot of you said you liked the Crack Ship Sans x Mabel. And a lot of you also said that you were dissapointed when the series ended. Well, here to satisfy your hunger of moderately stupid-cute things, a new book was born. It will feed off of your requests, and quench your thirst of adorable shipping. Anyways, hope you enjoy!
  • Ask/Dare Blueberry and Fell [DISCONTINUED] by Mimi_Kitty_
    Mimi_Kitty_
    • WpView
      Reads 13,969
    • WpPart
      Parts 17
    There are no rules and that's pretty much it
  • Undertale X Reader by Smol_Da_Vinci
    Smol_Da_Vinci
    • WpView
      Reads 1,449
    • WpPart
      Parts 2
    One-shots for Undertale. Requests are open! Have a good time!
  • New Love - Undyne x Underfell Sans (COMPLETED) by MissManglePro
    MissManglePro
    • WpView
      Reads 7,871
    • WpPart
      Parts 21
    A story how Undyne stood up for someone she thought would be somewhat like her sans, she finds that his life is more complicated then her Sans. Sans slowly becomes attracted to Undyne because of her kindness towards him, he learns that maybe not everyone hates him, especially his brother.