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  • Silently Sleeping (Underswap!Papyrus x Reader)
    245K 10.9K 37

    Underswap!Papyrus x Reader And some Fresh!Sans x Reader -_-_-_-_-_-_-_-_-_-_-_-_-_-_-_-_- It isn't hard to slip into a dream. You're happy with what your mind makes up and you stick with it until you wake up. Nightmares are hard to sink into. Death, tears, bloodlust, screams of terror and agony. You eventually wake up...

    Completed   Mature
  • A Little Bonely (Sans X Reader)
    343K 8.5K 51

    Monsters always fasinated you. Ever since Frisk broke the barrier and freed the monsters, humanity didnt take it too well but they are slowly getting used to it. Slowly. Very...slowly. (btw Chara is depicted as a female in this story, and so is frisk. Dun be triggy) HEY ALL! This is my first fanfiction EVER! so dont j...

  • My new pet Swapfell! Sans x Reader
    261K 5.7K 53

    You fallen into the underground, lost, confused...and no memories, what will happen to you when you encounter monsters that want your soul? Swapfell! Sans x reader

    Completed   Mature
  • Sans x Reader:You Are My Strength
    14.1K 607 13

    The world has been reset once again. The previous story line was a genocide route. Sans is happy to have his bro back. The time has come again for another child to fall down the hole. This time Sans is going to make sure this human will go down the right path. To his surprise a teenager has fallen, instead of the usua...

    Mature
  • Neko!Sans x Neko!Reader
    32.8K 1.1K 6

    Monsters came to the surface and Y/n could finally come out of her hiding spot. Y/n was a neko,mostly classified as monster. What happens if she meets a neko skeleton?

  • Corrupted Timeline: UF!Sans X Reader
    96.5K 3.5K 31

    While hiking with your family at Mt.Ebott, you end up falling down a hole in another world where you encounter monsters who want to kill you. Will you be able to change their hearts and bring back hope? Or will you be killed trying?

    Completed   Mature
  • Anything Can Happen (Sans x Reader)
    128K 4.1K 15

    An unexpected turn of events lands you in the depths of Mt. Ebott. Upon waking up, you found yourself with a interesting and skeletal duo. {Completed} Thank you so much for 10k+ reads and 300+ votes! \o/

    Completed  
  • A Girl Who He "Hates": Sans X Reader (Warning: Bad Puns, Feels, and Puns!)
    29.8K 1K 7

    Y/n L/n. The true name. The girl who everyone beats, torments, and blames for everything. The girl who is shy, forgiving, motherly, humble, and talented. The girl who everyone hates. Sans the skeleton. The punmaster, who is fun and laid-back and loves puns. What happens when he meets a human girl who he wants to hate...

  • Kind Of Comical [Sans X Reader]
    217K 7.4K 24

    //Undertale High School AU. Your typical High School story where you're the new girl~ //Except monsters and humans are together too. Involves time travel in later chapters. Never wrote an Reader insert before, so spare me! "You look lost there, Kiddo." A deep smooth voice caught your attention and you turned your h...

    Completed   Mature
  • In the Woods (Sans x Reader)
    79.5K 2.7K 25

    This is my first story. Its a Sans x Reader...basically its gonna take place after the true ending. You aren't Frisk or anything, just you. Humanity is actually happy to have monsters back. So yeah. Enjoy.

    Completed  
  • Sans X Werewolf Reader!
    82.9K 2.3K 13

    "When you transform imagine a big ass wolf! Like Jacob from twiligh Okay?:) Just giving you a visual

  • 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  
  • Lost in Despair (Lonely!Sans x Mute!Reader)
    431K 21.6K 49

    Press your fingers together, zip your lips shut, and throw away the key. Once it's time to be free, go fetch that golden key and speak. Unless someone stole your golden key and threw it in the depths of the Black Sea; your nightmares and worst fears. ---- "Even if it kills me a second time." ---- The series- First...

    Completed   Mature
  • Do you Trust me? (Underfell sans x Reader story)
    37.6K 900 19

    Making friends with others may sound easy as you think! But the thing that starts betrayal is breaking their trust Hah! Got your interest? It better! Feelings are coming up your way....

  • You Are My Sunshine Sans X Reader
    9.2K 336 10

    You are a 17 year old girl I'm not gonna follow the plot line of Undertale much so... Yeah.

  • How To Capture A Humans Heart (Sans X Reader)
    2.7K 165 9

    (This is the underground version! The other one is when they get to the surface) Youve just fallen down a hole because a bully which was trying to actually kill you was chasing you. You met a Flower and you've been rescued by Toriel,your goat mom. Now you asking for freedom from the ruins,what now?

    Mature
  • My Lazybones Sans X Female Reader
    69.8K 2.1K 34

    So you are a sweet and shy 15 year old girl who lives with her mother and father.Your Mother and Father have decided to take you to a trip to Mt.Ebott for a family vacation.Once you got there you decided you've wanted some alone time even though your father disapproves your mother convinces your father to let you expl...

    Mature
  • Underswap papyrus (sans....?) x reader
    95.7K 1.9K 36

    .....help me

    Completed  
  • <DISCONTINUED> H E A R T A T T A CK [Underfell Sans x Reader]
    12.3K 459 9

    You wake up on a bed of red flowers.As you find a yellow flower with a face standing in front of you.He warns you about TORIEL who wants to capture a human soul.But...it's too late.As she drags you to her home,you escape down a long black hallway.A skeleton called Sans captures you and locks you in his brother's shed...

    Mature
  • Human Again ~ Undertale ~ SansxReader {COMPLETED}
    44.7K 1.5K 26

    {THERE IS LEMON BUT READING IT IS OPTIONAL AND WONT AFFECT THE STORY} You've aspired to be a Monster specialist ever since the monsters had left the Underground. You leave on your first expedition to find as much information on each Monster as you could but then you're sidetracked when you wander into a cave, where th...

    Completed   Mature
  • Trust {Sans x Reader}
    179K 5.2K 19

    You woke up and tried to gaze around the darkened room, your vision was blurry. It was just a bad dream, you thought. Your eyes adjusted and you realized it was far from it... {Completed} Thanks so much for 300+ votes & 10k+ reads, holy heck.

    Completed  
  • A Long Road (Underswap!papyrus X Reader)
    64K 2.1K 22

    A curious child fell down a hole, simple story what happens next is all up to you (y/n) and you alone.When you meet the skelebros you felt like you've met them before you have no idea where from however they seem similar but different. Shall you stay or will you leave the underground forever?

    Mature
  • Mid-Sprin' Snowdin (Sans X Reader)
    11.3K 467 8

    You fell down as a child, down to the underground. You've always lived with Toriel... Well... Until a certain child decides to take everything away from you... ⚠Warning!⚠ Angst Feels Prepare to get your heart broken

  • Not A Test Subject (Science Sans X Reader)
    55.1K 1.2K 6

    You were a human who lived on the surface with an insane father who used living beings as lab rats and guinea pigs for his research he even used you. He tried creating your mother into a powerful being but the process failed and it took her life away, from then on he became insane. You decide that you should just end...

    Completed  
  • ~Why do you care~ [Underfell Sans X Reader] [•COMPLETED•]
    238K 6.5K 51

    Warning: possible swearing, inappropriate humour, perhaps lemons? Idk. Just stop being a goody two shoes and enjoy the book, kid

    Completed   Mature
  • Rescue (UnderFell!Sans X Reader Fanfiction)
    76.3K 3.2K 32

    It was supposed to be a search and rescue with your two closest friends. With your 'brother' Frisk missing now two days and that foster home giving less than a damn, it was up to you and your best friends to follow his one clue. But what happens when one little clue leads to a situation larger than life? Will you surv...

  • Underfell Sans x Reader Lemon/Smut
    86.3K 644 4

    I kinda fell in love with the idea of Underfell Sans in general. So why not be creepy about it? Enjoy *Eyebrow wiggle*

    Mature
  • Captured (Underfresh!Sans x Reader) //DISCONTINUED//
    122K 5.6K 32

    You never knew how it felt like to be caged like an animal. But after meeting Fresh, the love you two have for each other slowly burns away. The chemistry, the passion, the honesty. Instead of fixing the mess he made, he decides that you aren't needed anymore. Of course, it wasn't his decision. It was the voice in h...

    Mature
  • I hate to love you ~Underfell!Sans x Reader~
    6.3K 163 2

    Prepare for crappy writing skills-