Gastersans Stories

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198 Stories

  • Junkyard Dog and Serious Bones (Gaster!Sans X Female Reader) by RinLee1221
    RinLee1221
    • WpView
      Reads 19,771
    • WpPart
      Parts 15
    ((Any OC addition requests are welcome.)) (Y/n)...Known as the Junkyard Dog for her hostile attitude and living situation. Gaster!Sans...Known as Serious Bones for being a serious skeleton...That occasionally says a couple puns. WARNING: Mature Language and some almost lemon-y stuff MAY be included in story COVER ART made with the help of a good friend :3 To ask questions directly or to just hang out, join my Perfect Misfits Discord: https://discord.gg/QRtVv3D
  • Trust Me~~(A Gaster Sans x Reader) by GasterSansFangirl102
    GasterSansFangirl102
    • WpView
      Reads 5,582
    • WpPart
      Parts 17
    You're (Y/N). Just a normal girl, with a normal life, at a normal high school.... Or so you thought, until you met a some of the most unusual people...
  • Good girl loves a bad boy (Gaster Sans love story) by GoldenTigeress14
    GoldenTigeress14
    • WpView
      Reads 1,965
    • WpPart
      Parts 8
    Sharky lives by neon shark lake her wonderful little area that's been in her family for generations you can guess her powers neon, (neon pink)She's 18 and is also a DJ for Mettaton also she takes care of Frisk like a big sister for Toriel. One day Sharky and Frisk go to the MTT burger brand and here a new guy is stealing Mettatons fame by just being bad. when Sharky's talking and not watching where she's going she bumps into someone who's very interested in her.
  • Ask Gaster!Sans by Silverhaunter
    Silverhaunter
    • WpView
      Reads 2,528
    • WpPart
      Parts 11
    Ask away! G! Watches from a distance. "Are you really making me do this." *Yes "... Whatever." *You have no choice, G. I'll make him answer. Don't worry.
  • Test subject by xbutterfly_walkerXx
    xbutterfly_walkerXx
    • WpView
      Reads 86,188
    • WpPart
      Parts 22
    Gaster the royal scientist dark reality, you've seen the boys. You THINK you know there backstory. It's time for a harsh truth about Sans and Papyrus you never thought you would hear This story is based around my friends theory that Sans and Papyrus in a sense where 'made' by Gaster.
  • Keep on Digging [Gaster Sans x reader] [Undertale] by Nanapoe
    Nanapoe
    • WpView
      Reads 6,289
    • WpPart
      Parts 19
    "Mellow childhood gone On a warm evening. Nights were darker and the Sun was bleak. They came unexpected of Eerie nature. Rampage then Silent." 'Undertale' belongs to Toby Fox, its respective owner. Gaster Sans art belongs to Ƶafflesïa (?).
  • ᴜɴᴅᴇʀᴛᴀʟᴇ + ᴀᴜ'ꜱ ᴘɪᴄᴛᴜʀᴇꜱ  by Smokes_K
    Smokes_K
    • WpView
      Reads 1,346
    • WpPart
      Parts 27
    Pictures of your favorite Undertale (and AU) characters! ;)
  • No, I love her. (sans x protagonist ) COMPLETE!! by Peaches-chan
    Peaches-chan
    • WpView
      Reads 2,522
    • WpPart
      Parts 33
    Stuck in between wrong and right who will you choose? The man that stole your heart or the man who claims he'll jump off a cliff for you. All you want to do is be happy but what if that means some will suffer? Paige has a long journey and she's more than determined to finish. So this is my first story and I love Undertale... I get really confused with the x reader so I'm doing x protagonist. The protagonist can be you if you want but it's a girl so... The "fallen child" is name Paige because that's a pretty chill name if you ask me. I don't own any of Undertale period . Undertale is all Toby Fox none of me. I guess you could say what I write is how I would've handled undertale if I'm in frisk position. Oh and speaking of Frisk this is sorta an Alternate Universe. So Paige is the seventh and final soul. If people actually read this I'll write more. P.S. There may be errors but if you get confused somewhere please comment. Also please don't be a hater. Sooooo... UNDERTALE FANDOM UNITE!!!!!! oh Ya I'm kinda weird but aren't we all? -_- Also, I recommend that you play Undertale before you read this I DID NOT DRAW THIS PICTURE.
  • Gaster Sans! X Reader by KiraSimmons6
    KiraSimmons6
    • WpView
      Reads 58
    • WpPart
      Parts 2
    My first story Might do a lemon
  • Masterpiece (Gaster!Sans x reader) by Silverhaunter
    Silverhaunter
    • WpView
      Reads 1,588
    • WpPart
      Parts 2
    A touch of a hand, A longing embrace, A whimsical kiss, A one night's stand. ~*~*~* She's a masterpiece, and... she's mine. ~*~*~*~*~*~*~*~ (Somewhat borrows concepts from Echotale's version of Gaster!Sans.) (Female reader insert.) (Swear Warning, as well as, though there will be no lemons, there is chance, and high likelihood, of steamy moments.) (He's a skeleton, what do you want from me, you necrophile.)
  • Morning's call by bongobongos
    bongobongos
    • WpView
      Reads 67
    • WpPart
      Parts 1
    You and Sans both sleep in for the day and you're struggling to get up while he's ready to go. Sans tries his best to get you up for the day but it ends in a cheesy lovey-dovey love confession all over again, even though you have been together for 6 years now. Not that Sans didn't like it, he won't verbally admit that he's touched though. A hefty ton of fluff between Sans and the reader! Written in 2nd 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. * Sans/Gaster!Sans does not belong to me! All rights reserved, I only write for fun :) Covert art by elicitsins on tumblr.
  • Faint Memories {G! Sans X Reader} by CATAGORYGORE
    CATAGORYGORE
    • WpView
      Reads 2,493
    • WpPart
      Parts 25
    𝑇ℎ𝑒 𝐿𝑜𝑛𝑒𝑙𝑖𝑒𝑠𝑡 𝑂𝑛𝑒 𝑂𝑓 𝑈𝑠 𝐼𝑠 𝐴𝑏𝑜𝑢𝑡 𝑇𝑜 𝐺𝑒𝑡 𝐴 𝐿𝑖𝑡𝑡𝑙𝑒 𝐿𝑒𝑠𝑠 𝐿𝑜𝑛𝑒𝑙𝑦~ I don't own any pictures/videos/art beyond this point. Shout out to Toby fox for making undertale. The cover is NOT owned, or done by me! Totes to the artist they are awesome!
  • Break My Walls (G!sans x Frisk) Echotale by SmauriGoat
    SmauriGoat
    • WpView
      Reads 61
    • WpPart
      Parts 1
    When frisk and her lover ruled the jail she felt power, but when he betrayed her, the power she felt was really weakness. She build up her walls around her. Soon she will get to meet the one person who will free her from her despair
  • Why? • Gaster!Sans x Human!Reader by sansisnotonfire
    sansisnotonfire
    • WpView
      Reads 168,197
    • WpPart
      Parts 58
    'When I was 13, I killed someone. By accident of course... It was the day I found out I possessed some type of power.' You kept it to yourself for years until one day it all went wrong. For your own safety you run away to the depths of Mt. Ebott in hope that the legend was true. But once you fell down you start to realise that this may not be the first time... "You've been here before, Y/N. And this time I won't let you run"
  • Matchmaking: Gaster Sans X Reader by I_Cannot_Life
    I_Cannot_Life
    • WpView
      Reads 9,316
    • WpPart
      Parts 3
    It was a simple project for your programming class- to make a matchmaking app. Only catch, everyone's partnered with the opposite gender, so each gender gets input on the app. And it's even worse when you get partnered with a flirty skeleton.
  • Undertale One-Shots by FallingApartSkeleton
    FallingApartSkeleton
    • WpView
      Reads 68
    • WpPart
      Parts 2
    TEM HAZ ALL TEH HOOMAN SOULZ! So, will be taking requests for these, BUT! I will not be doing lemons, mainly because I find writing them to be 'hard'. Lol. Anyway, imagination has no limit to all the Sans..es? Sanses? Sans'? No idea. They're just little fluffy moments I imagine. Now, if you excuse me, I will be attending to the hospital. My appendix hurts. I'd say a skeleton joke, but I don't have the 'guts' to. Read this book for Temmie to get higher education.
  • Losses for Love {GasterSans x Frisk} by boothekid04
    boothekid04
    • WpView
      Reads 37
    • WpPart
      Parts 3
    Frisk and her sister Chara are out walking on Mt. Ebott; the place of the urban legend of the Underground, a place where monsters, who were cast away by humans, live; when suddenly, Frisk takes a fall into the realm of monsters. She encounters many monsters, a few that really warm her heart, but when she goes through some rough patches, even the most special monster to her, Gaster Sans, one of the skeletal brothers, isn't able to help her. What will become of Frisk and Gaster Sans' relationships?
  • Undertale AU: Reader x One Shots by TLCBookBean
    TLCBookBean
    • WpView
      Reads 12,613
    • WpPart
      Parts 11
    Do you like Undertale? Underswap? Underfell? Inktale? Another Undertale AU? In love with Sans? Papyrus? Well you're in luck! One shots for you and le Sans(es). (And Papyruses). (Lolz). I take requests. 🤗 No lemonade plz
  • The Fallen Child- UNDERTALE AU by luvssugarbum
    luvssugarbum
    • WpView
      Reads 108
    • WpPart
      Parts 4
    As the 8th child who fell in the underground, 5-year-old human, Davina Dreemurr, is adjusting to her new life in the underground, It is unknown that her mother, is still alive and feels that 'G', is a connection to her somehow. As they battle upcoming problems they'll face, they must help protect her and each other from dangers beyond her control. I hope you all enjoy it!! (Artwork for the Cover IS NOT OWNED BY ME!!!) (Couldn't find who made the beautiful artwork) (Also this is my own au I made called fallentale! It's abt the child after Frisk fell down into the underground.)