Select All
  • [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
  • Let Me Run
    702K 29K 67

    It's been two years since the barrier was shattered... All was well until humanity's opinion and voices ruined it all. The war had begun. --------------- Although one girl had always seen the world as a sickening place... A majority of humanity was indeed contaminated, but she was one of the individuals who deserved t...

  • "You Can't Escape Now , Doll" (Gaster!Sans X Reader-chan)
    80.9K 1.8K 20

    Your a 18 year old girl named (Y/N), you've been living in the underground for 1 week and you've been staying with Tories. You had run away from a family who never really loved you except your brother. So you tried to do what most people would have done and tried to commit suicide. That plan had failed and that's when...

  • 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...

  • Rythmic Blues (Dancetale Sans x Reader)
    6.2K 263 3

    I looked at her, a reassuring smile gently lighting my face. "You can do it." I said, quietly, "I believe in you, kiddo." She laughed, "What sucks is, I don't believe in myself. I can't dance. Not alone. I get scared." I sighed, "You'll be fine, why do you even have to do this anyways?" "...There's this... academy...

  • From The Depths of The Ocean Oceantale X Reader
    70.1K 2.9K 20

    The year is 18XX You are Lady (L/N) , tutor to a young girl named Frisk. What happens when you're on a ship with the young lass and a storm hits? Only time will tell....

    Completed   Mature
  • My Mafia Queen [Undermafia( Sans X Fem!Reader)]
    21.2K 613 4

    "Don't mistake my kindness as my weakness. I'm being kind to you 'cause I'm repaying you for your kindness. But if you it with something that isn't good at all. I'll make sure that MY kindness will be the last thing you'll get. " I heard that a couple of times from dad. Believe me I was born into the throne. I was bo...

  • No More BONELY Nights- UNDERTALE FANFIC (Self-insert Sans romance)
    183K 6.6K 23

    You're in a world post-game of Undertale. Monsters were flooding up from the Underground, and no one was quite sure what to do with them. Most people knew of them, and expected it eventually. It was hard to get used to seeing these... People, you guess, but it became normal after the first month or so. They started ge...

    Mature
  • Dancing Into Tomorrow//Dancetale
    46.5K 1.9K 25

    He had given up. He didn't care about what was happening around him. He didn't care about dancing anymore. He hardly cared for anything now. But secretly, he cared too much.

    Completed  
  • Cryophobia - (Sans x Reader)
    1M 41.7K 24

    Next person to comment on this monstrosity gets fucking vored!! × ❝You made your choice a long time ago.❞

    Completed  
  • *DISCONTINUED* Can you hear me? [Sans x Reader]
    593K 21.4K 45

    *Discontinued* This is the original version of Can You Hear Me? in it's unedited form. Monsters were back on the surface! But not everyone was happy with the change... though you aren't one of those people! Happy as a (relatively) popular singer, you were oblivious to the growing discontent. That is, until you met Met...

  • I Can Hear You. [Sans x reader]
    16.1K 611 3

    This is a collection of chapters from my [Sans x reader] fanfic, Can You Hear Me? but from Sans perspective. Before reading this, I suggest you take a look at the main story, as this one will be based on the votes I get for the different chapters and probably won't make sense otherwise. It's been a few years since the...

  • Princess of the Underground (Gaster!Sans x Female Reader)
    146K 5.9K 55

    [Y/N] lived with her adoptive mother Toriel for a while. How long is that? About three years. Throughout the time, the monsters in the Ruins know her as if they were her siblings. Flowey became way nicer each day around her, losing his soulless behavior. He cares about her so much he promise to protect her. All was...

    Mature
  • 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
  • Undertale Mob AU
    18.1K 567 10

    This Undertale fanfiction follows the lives of various members of the Monster gang.

  • It's Always Raining Somewhere Else (Undertale SansxReader)
    33K 1.5K 27

    Reader is a little mentally unstable so you are sent to a high school for the gifted and talented which just has to be the only high school enrolling monsters at the moment but monsters have been underground so long they have to learn all the new things right? Right?? Takes place around the end of the school year and...

  • Fifty Shades Of Blue {Sans X Reader}
    33.5K 402 6

    "Come to my office, I'd love to get to know you~"

  • Mindless (Sans x Reader)
    88.9K 3.2K 22

    What if you had no choice? You are being controlled by a Demon to kill your friends and the one you love over and over again. Each time you gain control over the demon it's usually too late. When you finally get close enough to stop the demon how do you manage? A SansxReader undertale fanfic written from your point o...

    Completed  
  • Blown Through The Rift (Gaster!Sans X Reader)
    243K 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  
  • Pick-up Lines {Gaster!Sans X Reader}
    5.1K 208 1

    Well, because WHY NOT?!?

    Completed  
  • Gaster!Sans
    17.7K 791 30

    ((IMPORTANT: I SUCK AT GRAMMAR WITH MANY TYPOS AND CURRENTLY FIXING IT WITH MY EDITOR, THANK YOU)) (Updated whenever I have the time to write) So Gaster!Sans and Gaster!Papyrus came to the surface. This is generally surrounded of Gaster!Sans and THERE WILL BE NO LEMONS WHATSOEVER. Gosh, I'm never going to write any of...

  • A Problem? {Ink!Sans X Reader X Error!Sans}
    265K 9K 55

    "W- Who are you?" "YOU DON'T HAVE TO DO THIS!!" "Just be safe." "Here, let me help you." "I don't want to hurt you!" "Calm down." "Please Stop." "Listen, it's okay." "Don't worry." "Be careful!" "Everything's alright." "I won't ever let you get hurt." "I Promise." "I Promise." ~~~~~~~~~~~~~...

  • Gaster x Reader: Trusting The Man Who Speaks In Hands
    38.8K 1K 12

    Your walking through waterfall when a door you've never seen before, materializes before your eyes. When you open the door you see him...

    Mature