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  • 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
  • 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...

  • Junkyard Dog and Serious Bones (Gaster!Sans X Female Reader)
    19.7K 828 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...

  • 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?

  • Crossfire -Gaster!Sans x Reader
    92.4K 3K 42

    What would you do if you lost your family and had to be alone? A girl named Y/N, has lost her family from the war. She hates monsters to this very day. But what if she finds a monster that changed her life forever? Would she befriend the monsters or make more of an enemy out of them all? ____________________________ I...

  • Hurts Like Hell (G!SansxReader)
    191K 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
  • GasterSans! X Reader Chan
    33.3K 1.1K 21

    You're having flashbacks about the past and the life you had with real life monsters. You're feelings to one particular monster takes you to your limits, and you discover something extraordinary yet life changing. (sorry this sounds way better after one of my follows said it's really confusing so I'm sorry if it was)...

  • 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...

  • 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...

  • 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
  • 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
  • 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  
  • What Lies Inside (Gaster!Sans x Reader )
    98.4K 3.9K 46

    "You know sweetheart, lying doesn't get you anywhere with me." He said lighting a cigarette and placing it in between his teeth. Vanilla, leather, and smoke is quite the intoxicating smell. "I'm not lying, also who gives you the right to judge if I'm lying or not?" Something flickers inside me, a warm burning feeling...

    Completed   Mature