Underfellsans Stories

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242 Stories

  • Rescued by Radskull86
    Radskull86
    • WpView
      Reads 22
    • WpPart
      Parts 5
    FIRST FIC, plz leave help in comments! You take in a bitty, user is female First story, not turning on mature since it's just cussing and maybe some violence but probably not This is a you pov btw!
  • Marked in Red, Claimed in Gold (Mafiafell Sans x Reader) by clubofsnakes
    clubofsnakes
    • WpView
      Reads 139
    • WpPart
      Parts 6
    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. I was inspired by- @MissHoll-E-Socks with their story "Can I take you to dinner?" NONE of the art is mine.
  • Ask And Dare Sans And The Other AU Sans (DISCONTINUED) by SimplyAngelie
    SimplyAngelie
    • WpView
      Reads 6,969
    • WpPart
      Parts 16
    NEW DESCRIPTION: This book is discontinued along with Behind the camera. A NEW One would be out soon. Read the latest update for more information! OLD DESCRIPTION: So, I managed to finally gain enough courage to write my first book so ya hope you enjoy! (Might have some grammar errors etc in this but I'm gonna try to avoid that) You can ask: Me Sans (UT)/Classic Red Blue Dust Ink Error Gas Pacifist Sci Outer Geno Reaper G Lust (NEW)
  • Evil Sanses x Reader 2.0 by Devxil
    Devxil
    • WpView
      Reads 2,527
    • WpPart
      Parts 6
    This is a rewrite of my first ever Sans x reader kind of story. I hated the first one for bad writing skills, but I have come a long way from that. So have fun. *Hi, I'm (Y/N)! I lived a mostly normal life when things started going downhill. And I don't mean the diffrent kind of skeletons kidnapping me. But oh well that happened too. Come find out about my horrible borning life turning into a horrible nightmare. Or even perhaps something romantic..?*
  • Black velvet Underfell! Sans x Reader by Kath1908
    Kath1908
    • WpView
      Reads 1,228
    • WpPart
      Parts 20
    AUTHORS NOTE: This story wont be updating fast. my work is kinda hellish right now. (Y/N) otherwise know as the internet idol (I/N) has had her sister Frisk disappear on her. When she sees Frisk again she finds out that Frisk has freed the monsters. How will everything work out?
  • Not shattered, just broken by crimewaiv
    crimewaiv
    • WpView
      Reads 387
    • WpPart
      Parts 2
    !!WARNING!! Contains Honeymustard And may contain future 18+ content! Red finds himself in underswap, near dusting. Saved by a tall skeleton in an orange hoodie, Will he be able to find love in this strange new place? Or will his trust be the death of him.
  • Agony by BrandonBridges
    BrandonBridges
    • WpView
      Reads 24
    • WpPart
      Parts 1
    This is a fanfic about underfell sans and his childhood. TRIGGER WARNING: Abuse, Rape, Murder, Torture, Homophobia. If you are triggered any of these then I reccomend you to not read this.
  • The More You Know by Do_You_L0VE_Me
    Do_You_L0VE_Me
    • WpView
      Reads 310
    • WpPart
      Parts 2
    Y/N is quite possibly the biggest Undertale fan there is. She knows just about every detail about almost every AU. On a completely normal Sunday, Y/N opened her laptop and begun to play the one and only Undertale. While walking throughout Snowdin, her game crashed. As she tried to log back in, she found that all the characters where gone. Their sprites we're just black glitches and the text wouldn't even come up. It was like everyone had disappeared. Confused, Y/N decided to just watch someone play it on YouTube. But as she searched, she couldn't find anything related to the game. She checked Instagram, Wattpad, Tumbler, everywhere, but it was as if the game itself never existed. Y/N Couldn't get any results for Toby Fox. She even called her best friend who was also a fan, and when she asked, her friend questioned what she was talking about. Blown away, she tried to open her game again, only to find it gone. All of her fan art she had drawn was replaced by empty papers, all the photos she saved were deleted. As one final test, she googled, "Mount Ebott" To her surprise, the same rumor about the mountain popped up without any trace of the game. Digging deeper, she searched the location of the mountain and found it to be right next to her city which had been renamed, "Ebott City". With adrenaline pumping through her veins and a fangirl pit in her stomach, she grabbed her shoes and ran all the way to the mountain. Just like every fanfiction she had ever read, a hole sat on top of the mound of land. Standing on the edge of the black abyss, she knew that if the rumor wasn't true, and neither was her theory, she would be dead. And even if she was correct about what was down there, if she didn't the SAVE and RESET button, she would die. Hell, she didn't even know what AU she was in. It could be horrortale for all she knew. But it was a risk that every Fangirl was willing to make. Her completely normal Sunday was about to get not so normal.
  • Love Or Be Loved (Underfell Sans X Reader)  by TricksterCherrySans
    TricksterCherrySans
    • WpView
      Reads 2,106
    • WpPart
      Parts 13
    You have known things about what happens in Underfell and desperately want to reach out to Sans and tell him everything's alright.
  • You were my light (the world is so dark) by A_Bored_Reader
    A_Bored_Reader
    • WpView
      Reads 246
    • WpPart
      Parts 2
    Red had always been by Sans' side. Classic's side. It didn't matter when the story changed or stayed the same, Red would always be there for him. He stayed when Undertale got to the surface, watching as Sans drifted away from him. He stayed when Classic was left bitter by neutral runs, lashing out. But then came the endless genocides. He tried to be there, to try and ease Classic's pain as much as he could. But then, the original AU was locked. When it opened up again, Classic wasn't there.
  • Welcome To Underfell by AislingRoyston
    AislingRoyston
    • WpView
      Reads 51
    • WpPart
      Parts 2
    After the 100th genocide run, Sans has found himself in the lonely, black abyss of the loading screen. Through here a new doorway, to a new world awaits our comical protagonist. New threats will arise as well as friends , maybe someone who is more than a friend, someone unexpected.
  • UnderLife by InkSans1InkTale
    InkSans1InkTale
    • WpView
      Reads 8
    • WpPart
      Parts 1
    Hola! Soy Ink, siempre me han gustado todos los AUs, pero como seria si unimos todos?
  • Underfell Papyrus x reader- All hail the king (Completed)  by Kath1908
    Kath1908
    • WpView
      Reads 54,256
    • WpPart
      Parts 23
    A young human runs out of the ruins desperate to get to safety. She runs into the Skeleton brothers Sans and Papyrus. Before she can know what's happening her world is completely thrown upside down. Sans is horrible but Papyrus.... he's not as bad as he makes himself out to be. What will happen to the young girl? Will she be saved or killed? And will she finally figure out the secret her mother was hinting at before she died?
  • UNDERTALE AUS ONESHOTS by XxTsunderegirlxX
    XxTsunderegirlxX
    • WpView
      Reads 797
    • WpPart
      Parts 5
    no description XD can't think of anything
  • Promise by bongobongos
    bongobongos
    • WpView
      Reads 26
    • WpPart
      Parts 1
    She was ready to give in to her thoughts, but Sans didn't want to let her go ever. Not like this. It's never easy to win a battle where you're struggling to keep your own very self alive. And so, he wanted to give his all to support her through it all. Even if it felt like things weren't getting better for a while. Basically, angst and comfort with reader + Sans. Written in 3rd person's point of view. *Sans in this fic is heavily implied to be Gaster!Sans/Echotale Sans, but you can switch out his nicknames for it to be any AU Sans. *Reader uses she/her pronouns but can be of any gender up to the reader's interpretation. *Sans/Gaster!Sans does not belong to me :) I just write. Cover art by elicitsins on tumblr.
  • Underfell Sans X Reader (DISCONTINUED AND DEAD) by ICharaLot
    ICharaLot
    • WpView
      Reads 132
    • WpPart
      Parts 4
    (DISCONTINUED) I have no Idea what to call this. Call It whatever you want. It's an Underfell Sans X Reader. You are in the role of Frisk in the Undertale universe, and something mysterious happens to your reset button. Oh, and you communicate to Chara through thought.
  • Six Skeletons One Teen by Fidelibus
    Fidelibus
    • WpView
      Reads 4,773
    • WpPart
      Parts 4
    After you ran away from home, you sneak into a manor which unbeknownst to you, was home to six skeletons. They agree to take you in for free, one one condition: You stay with them until your 18th birthday. Now you're working for six skeletons as a maid, all while going through puberty. This is gonna be one heck of a ride. (This is a parody to RaccoonSinQueen's Six Skeletons One Maid story, found on AO3. If you haven't read it yet, go check it out!)
  • !!SURVER DOWN!! by Growling_Thunder
    Growling_Thunder
    • WpView
      Reads 14
    • WpPart
      Parts 1
    When Underfell has a large glitch in their main surver--Who the hell is going to fix it? ..I dunno why are you looking at me?
  • I love you a skeleTON ( sans x chubby reader) (discontinued! Sorry!) by SierraColor
    SierraColor
    • WpView
      Reads 183,274
    • WpPart
      Parts 31
    Mainly what the title says. Lots of Sans, ton of SANS, Undertale sans, undefell sans, ALL THE SANS. BUT WITH A CHUBBY READER. WHHHAAAAT I KNOOOOW. READ FOR THE FLUFF THE CUTE FLUFF. (BUT IF YOU WANT SOME LEMONS HONEY, YOU GONNA HAVE TO WAIT TILL I GET THOSE IN ANOTHER BOOK. ;) ) Also, there will be a request chapter, I won't take all requests, but I will take some. ALSO CAN I JUST THANK YOU GUYS FOR 23k?!! LIKE WHAT?!! (Tbh if we get to 25k I might just continue that little one shot y'all keep requesting for me to continue to there's that.)