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  • {Broken Already}-Sequel G! Sans x Reader
    9.3K 465 13

    A girl who lost her sister she didn't even know she had. Now she seeks revenge. But something isn't right. Somethings coming. Something big. Now the fate of millions of people rest in her hands. Will she save the world? Or destroy it?

    Completed   Mature
  • The worst way (gaster Sans X reader)
    83.2K 2.1K 24

    Normal days in your huge...lonely....stupid house that was given to you by your mother and father. They gave you everything, but not out of love, just to get you out of the house. You were only 16, you could barely even drive. They bought you this house, bought you a car, a nice one, and gave you your uncles motor cyc...

    Completed  
  • {Broken Already} Gaster Sans x Reader
    122K 3.7K 25

    "That's how I ended up here." "Seems bad." "Oh no, it was hell."

    Completed  
  • 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
  • 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?

  • Sorry About That (Gaster!Sans x Reader)
    87K 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...

  • Dear Demon(Gaster!SansXReader)
    15.9K 521 22

    You woke up, it was monday. You were going to your wardrobe to change your clothes... But there was no wardrobe. You was in a decaying dirty couch, in the middle of nowhere. You forgot that your house was burned to the ground by some human-hating monsters, while your family and friends were there. And you watched them...

    Mature
  • The Perfect Time ((Gaster!Sans X Abused!Reader))
    33.6K 879 16

    5 years. 5 years it's been. 5 years since Frisk freed the monsters. 5 years since your mom left you. 5 years you've put up with your father. 5 years of suffering and anguish 5 years of torture and abuse, mentally and physically. But that was gonna be stopped. ~~~~~~~~~~~~~ Meet (Y/N), a abused runaway with an attitud...

  • The girl ~=~Gaster!Sans X Depressed!Reader~=~ #Wattys2016 (COMPLETE)
    100K 3.2K 42

    She stopped trying to ignore it all. She stopped trying to act like it didn't hurt. She stopped trying with it all. The only way to get away.. was to escape.. But what if someone stops her.. someone, she'd never expect. Maybe someone.. she had met before. ===============================================================...

    Completed  
  • Hurts Like Hell (G!SansxReader)
    190K 7.1K 40

    This is a Slowburn so hate me all you want, I dont care. If you dont like it then dont read it. Basics: y/n-your name l/n-last name e/c-eye color f/c-favorite color h/c-hair color s/c-skin color Setting: Monsters were released from the underground and onto the surface. The Humans were use to living with them but not u...

    Mature
  • [Gaster! Sans X Reader] Soul Of Freedom
    52.2K 1.8K 15

    You heard about it. When the barrier was shattered. When monsters were finally free. That was until another war broke down, causing them all to get trapped in the underground again. Rumors spread that the humans killed a child named Frisk for setting them free. "Every monster that we find out in the surface, will be s...

    Mature
  • Photograph Echofell Sans X Reader
    75.9K 2.9K 20

    What's going on? Why is this happening to me! You were an experiment and he was a failed one what will happen when you two meet in a dystopian world?

    Completed   Mature
  • Snowglobes ∆Gaster!Sans x Reader∆
    70.5K 2.9K 62

    Highest Rank: #290 in Fanfiction ××× "Its a mad, mad, world out there, girlie. And your kind just makes it madder." Everyone has a lock. Some people are lucky enough to find someone who holds the key. Opal's lock has been rusted and unused for years. But when a bipolar skeleton wipes away the dust and doesn't mind...

  • 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...

  • Gaster!Sans x Bullied!Reader
    12.5K 453 42

    (Y/N) is your typical freshman girl. You know the usual clutzy, shy, over achiever with a badass double life. In the day time, she's bullied by her fellow classmates for being a neko-human hybrid despite looking almost 100% human. At night, she's feared by monsters and humans alike. Stabbing anyone who tries to get to...

  • 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...

  • Gaster!Sans X Reader DISCONTINUED
    1.4K 76 4

    This is a Gaster!Sans x reader. I've only had this idea for...2 hours now, so it might not be very well-developed, but here goes. Hope you enjoy! (I am absolutely terrible with these.)

    Completed   Mature
  • 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...

  • For Your Sake (Gaster!Sans X Reader)
    60.5K 3K 20

    THIS IS A SEQUEL BOOK!!! IF YOU HAVE NOT READ THE FIRST BOOK YET THEN GO FIND IT ON MY PROFILE!!! Anyway, now for the summary: After death, you hadn't expected much to happen. You fell immediately into a place like the void. You just wanted to reconcile for what you'd caused, but your heart had a wish of its own. You...

    Completed  
  • Two Hot Skeletons - which to Choose?《 Gaster!Sans X Reader X UnderFell!Sans 》
    18.1K 688 8

    [Y/N] [L/N] is just a normal person, but that's when she has call from a very, very important person in her life, and who knew a simple call could forever change her life? Cover made by: BRAINLESSBEING

  • Manipulation [EchoFell Sans X Reader]
    18.9K 504 6

    It has been a year since the monsters were freed. You had literally been through hell and back with them; changing every single one of their personalities around as much as possible. Being EchoFell, the only one who was actually nice to you in the beginning was the timid plant. After a while, things were really lookin...

  • The Skelly Badboy(Gaster!SansxReader)
    34.2K 1.2K 17

    Yeah my account was delrted so today I shall start making a story about Gaster sans and the reader..might lead to smut so be warned

    Completed   Mature
  • Without You. [[:]] Gaster!Sans X Reader [[:]] (#Wattys2016)
    37.1K 1.6K 35

    Hello. I'm [Y/N] [L/N]. I grew up with my father. My mother has died when I was about 5. My father always blamed me for her death. And in each second, I'm starting to blame myself, too. My mother died in a car accident. She was just driving me to a my favorite restaurant; [F/R]. It was dark, and my mother couldn't see...

    Mature
  • Darn Hot Skele-Guy... [[:]] Gaster!Sans X Reader [[:]] [D I S C O N T I N U E]
    44K 1.4K 25

    I.. I don't know why I'm writing this..

    Completed   Mature
  • Solid Yellow Tear (Gaster!Sans x Caring Fem!Reader)
    56.1K 2.3K 28

    A young girl would walked through the woods hiding from any human that would capture those. Until she heard a faint cry of the young girl who saved them from the under ground only then that would change her life, she hated seeing monster in pain, hurt, and tortured just because they weren't human.This young girl, woul...

    Completed   Mature
  • My Soul? It's Yours.
    92K 3.7K 26

    You become a citizen in Snowdin due to being lost in the undergrounds. You had left Toriel and the ruins only to be greeted by someone you would've never thought to be so important, or essential, to your life. *warning: might get serious and have adult content in some parts also maybe some spoilers for both the pacifi...

    Completed   Mature
  • Try me, Bones. (Gaster!Sans X Reader) Wattys2016
    110K 3.7K 36

    The only way to the top in this world, this world born of war, born of death, the only way of ascension? ...is to become someone you don't want to be. And so I've got to break a promise. Because I've got a job to do. And there's no-one who's going to keep me from it. ~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~*~...

    Completed  
  • To Love A Demon (Gaster!Sans X Reader)
    106K 3.9K 30

    *Do you fear me? "N-No" *Are you sure? "Yes." *You will learn to fear me Heh. Well here we are! I hope you enjoy this sin. I'm going to take my time and let you learn to love the characters slowly. So if you're the ones who like lemon in the first chapter, this is not for you. *Don't worry sweetheart. It will be worth...

    Mature
  • Blown Through The Rift (Gaster!Sans X Reader)
    244K 9.5K 35

    You were working with Alphys in the lab in Undertale when chaos strikes! In a freak accident, concentrated determination is mixed with an unnamed concoction and blow you through a dimensional rift. When you reawake, you find yourself in what seems to be the beginning of Undertale once again. Upset but not overly surpr...

    Completed  
  • 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...