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  • Just Like Before (A Gaster!Sans x Reader)
    51.1K 1.5K 29

    ♦Highest Rank :#714 In Fanfiction! ♦ Y/N fell down the Hole of Mt.Ebott when she was 8 years old. She lived happily with Toriel and with Other Monsters. She has a best friend named Gaster!Sans.She calls him 'Gas' for short. They always play at the Castle where Y/N's home is. Y/N broke the barrier before she and gas be...

  • Golden Paint Stains [EDITING]
    11.8K 672 22

    She is an Artist. He is a Bad Boy. This should be fun. ||a Gaster!Sans x Reader fanfic - EDITING|| Painter was always the one that got away. From the cops, I mean. This mysterious figure was Ebott City's top graffiti artist, famed for their large wall murals that always seem to appear overnight. Nobody would ever...

  • [DISCONTINUED] Undertale Lemon
    6.1K 87 15

    08.30.2024 - DISCONTINUED Sex is one thing you could do to pay off your shitty daily activities.

    Mature
  • Just A Touch {Gaster!Sans x Reader}
    46.9K 2K 14

    After the monsters raised from Mt. Ebbot they quickly declared peace. They coexist and lived with humans, for a single moment everything was perfect... but then that moment changed. The ambassador of monsters became ill, the greedy humans saw this as a chance to attack. No one can really pinpoint who made the first s...

    Mature
  • Everybody Wants To Rule The World « Gaster!Sans x Reader »
    7.5K 307 11

    The crown.. The only way to get the freedom.

  • Eyes of Fire (Gaster!Sans x Reader)
    270K 11K 63

    (FAN FICTION BASED OFF OF VIDEO GAME 'UNDERTALE') His eyes were like fire. Amber. Dangerous. But they intrigued me. The flames of his soul danced and encased my heart. It was needless to say that I didn't mind. (COMPLETED)

    Completed  
  • Error!Sans x Child!Skeleton!Reader
    73.4K 1.6K 6

    BASED ON A CHARACTER I MADE, I WILL WRITE A STORY SHIPPED WITH ERROR SOON! DRAWLING IS HARD! ----------------- You never knew that you lived in a multi verse or that your life was slowly becoming useless until somebody had to severely tell you it. You soon grew connected to Error like he was your brother, did he feel...

  • Hell's Hounds(Gaster!SansxReader)
    7.9K 221 3

    So, Frisk set all the monsters free from the underground and they're becoming the ambassador for the monsters. And in this story Sans happens to be Gaster!Sans due to a 'accident' that is the cause of Gaster's death. And you're like forced to protect the 'gang' (Frisk, Papyrus, Gaster!Sans, Flowey, Undyne, Alphys, Met...

  • Little Kitten~ (Gaster!Sans x abused reader) //Discontinued
    1.3K 38 11

    This is my first so plz dont judge too hard ( ͡° ͜ʖ ͡°)

  • What's Up, Doc? | Gaster!Sans X Reader
    18.8K 701 16

    ------------------------- "Well would you prefer 'glasses' or 'human'?" He smirks. "..." You glare at the smoking skeleton. "Then Doc it is." ------------------------- Things to remember: | Author's Notes (A/ns) are written like this. | | Swearing. No lemon. Just fluff. If lemons shall be added, they'll be censored. B...

    Completed  
  • Gaster!Sans X Reader
    649 11 6

    Will eventually turn into lemon

    Mature
  • Stuck in Between (Reaper!Sans X Reader)
    122K 4.8K 20

    When your heart stops, you're supposed to stop there. But when your heart stops in the Underground, your soul resets. But what if the reset doesn't work. You're stuck in a stalemate between life and death after your attempted reset glitches. Memories fuzzy and distant, lonely and cold, what does one do to survive thei...

    Completed  
  • the light in the darkness ( reaper!sans x Goddess!reader )
    52.8K 1.1K 36

    so, uh I got this idea from another story ( please don't tear me to shreds I son't remember the name I jut REALLY REALLY LIKED IT BUT I BELIEVE THEY ARE DISCONTINUING IT ) you are the goddess of darkness you are like a rebel and brake rules .....

    Completed  
  • The Angel Of Death ( Reaper Sans x Reader )
    34.7K 1K 30

    You are Mother Earths youngest angel student. You where the next care taker of the earth while Mother Earth had to do business. You where walking to your new job when run into the killer himself... Death. But the longer he hung around you grow feelings for him, but is it destiny?

    Completed   Mature
  • Sans and Papyrus(AU's) X reader or other Sans and Papyrus Oneshots
    5.2K 72 13

    The Oc/Ocs do not belong to me I was borrowing Sonar from my sister aka SonarTF and others I will say in that oneshot.

  • Lost Without You (Gaster!Sans X Reader)
    76.5K 3.5K 18

    This story will contains things such as ABUSE, CAPTIVATION, VIOLENCE, ect. This is the only warning I will give, so if it's not your cup of tea- sorry about that! . . . Death. War. Violence. A world torn apart by two separate races. In a place like that, can peace even exist? Will you fight for your freedom as a human...

  • Just a Little Love - Gaster!Sans x Reader-Chan [PAUSED]
    2.1K 120 13

    This fanfiction is about a teenage girl, who wants to stop the sudden war that broke between the races of humans and monsters,(since the barrier shattered) , you want to make peace between the races, so you set off on a journey. Read the story to know what happens next...

    Mature
  • G!Sans x Reader
    36.2K 1.4K 20

    You sigh shakily, your fingertips lightly pressing on the door handle. You were just about to walk into your house, to them. Your parents were extremely abusive, you could never understand why. But from the earliest memories you had, they were always excessively violent. You were afraid because you had come home late...

  • Undertale one-shots
    26.1K 234 14

    This story will have some fluff, lemons, smut or just innocent ones. You may request if you like, I will gladly accept them. I won't use Ocs, only cannon and readers. Undertale belongs to Toby Fox.

    Mature
  • depressed!ink x depressed!reader
    34.7K 1.1K 14

    BOOK FINISHED: 1/1/18 issa dumb old book i finished but read it if you want,,, but this book isn't that magical.

    Completed  
  • Sweatheart, I'm a Mobster. {Mafia!Gaster!Sans x Reader} ||SLOW UPDATES||
    16.2K 659 5

    -------------------------- The 3-year-old frisk cried, as you held them close, rubbing their back. "Kitten, who's this?" The skeleton asked. I growled. "Kitten? That's my sibling, Frisk!" ------------------------- I have seen none of this hot mobster mess of a skeleton. Why not make a hot mafia mess of a fanfic?

  • be my girl (gaster sans x reader) EDITING
    99K 2.5K 27

    You are a 16 year old girl with a magic glowing eye living in the ruins with toriel and frisk you're younger sister. you have never been let out of the ruins not until one day toriel sends you to meet 2 skeletons. will you fall in love with sans or will you're love crumble? undertale belongs to Toby Fox

    Completed  
  • Losing it ( G!Sans x reader)
    993 25 9

    You know Chara she killed everyone but you can understand her some way one day you were walking around and a cage fell on you. when you see a skeleton.Your life changed weird to crazy the craziest thing is when you meet someone who looks like Chara named Frisk . Once you get a vision of another time line .You start...

  • The Guy In Black {Gaster!Sans x Reader}
    8.9K 267 2

    Your big brother, Jacob, and you were orphans. Your mother had left you after your father had died, leaving you to be alone. So you two set out, hoping to find a new town or a village that would take care of you. But you, on the other hand, loved stealing things for survival. Sometimes, you broke into people's houses...

  • Sorry About That (Gaster!Sans x Reader)
    87.1K 4.3K 27

    You worked for the newspaper, doing a simple editing job and a few other things here and there. Ever since monsters came out of the ground, though, rent has sky-rocketed for you. You thought you could deal with it, but after a few months you need a roomie to help with the rent. Which, fortunately, you got one! But, un...

  • Hidden Inside (Gaster!Sans X Reader)
    85.9K 3.4K 31

    After the monsters are set free, they aren't too keen on befriending humanity. They won't show themselves yet. They will get revenge on the war the humans had waged years ago. Now they attack in secret, getting patrols and assassins prepared at nightfall. One of the pairs of assassins is Gaster!Sans and his brother. W...

  • A lost and found Gaster!Sans X Reader
    356 3 8

    Gaster sans X Reader, This is my first book I have done :-)!

    Mature
  • Sans X Fem!Reader Oneshots!{All Au's Too!)
    5K 62 8

    Just au sans x reader one-shots if ya wanna request just comment in the Request Chap.I hope you Like It❤️️🎉

  • Hey, Doll | Gaster!Sans x Reader
    259K 13.2K 47

    Alone in a condemned world where monsters and humans fight for power constantly, Y/N survives off of the wood's riches and the small scraps of shelter she can find in ghost towns. Allies and friends have come and gone during the war, either killed or have parted ways. It's not all that bad. She could be dead, after al...

    Completed   Mature
  • TRAPPED - Gaster!Sans x Reader
    18.2K 655 30

    (Cover Art is not mine.) You don't remember who you are, or who you used to be. You've woken up in an abandoned costume shop with amnesia, after the second human and monster war. The monsters were victorious this time, and practically all that's left of humanity is trapped in the Underground. You find a journal explai...