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  • 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  
  • The War Amongst Us (W.D. Gaster X Reader)
    64.5K 3K 24

    (Y\N) is a young female spy and soldier fighting in the War of Humans and Monsters. She is fighting on the humans' side of the war until a turn of events when she becomes apprehended by the enemy. What will happen when a young monster scientist tries to change her views? Thanks to Itachei on Deviantart for letting me...

  • Forced Love (GasterSans x Frisk)
    45.2K 1.4K 19

    Frisk and her parents own a large mansion in a city. When she turns 18 her parents decide that she's now old enough to get married. Her parents are protective but also quite strict, so they decide Frisk should get a organised marriage. Will it work out for Frisk? {All characters and art belongs to their rightful own...

  • Can I take you to Dinner? Mafi-fell!Sans x Reader. [COMPLETED]
    206K 6.5K 33

    "How rude, not even gonna ask for a name??" He teased. "Why are you here?" You glowered, raising the whisk. The skeleton scoffed: "Well, glad you asked sweetums! Name's Sans, Sans the skeleton." - Y/N, a ritzy waitress at Grillby's is plucked from her world of pancakes and Orange juice into the gun-slinging, smoke-bre...

    Completed  
  • Fallen Angel (Gaster x reader) OLD
    148K 6K 49

    OLD AND BADLY WRITTEN THE REWRITE IS POSTED ALREADY DISCLAIMER: The god figure created in this fanfic is purely fictional. He is purposefully made to be prideful and cruel and is not supposed to represent any god. I am religious myself and I did not intend to attack anyones believes with this book. An angel. Sign of...

    Completed  
  • HP (W.D. Gaster x Reader)
    57.3K 1.8K 20

    You lost your father in the war against the monsters. If it was up to you every last being that fought against man would be sent to execution. But it wasn't your choice.... unless it was? That's when you decide to visit the underground. All you needed was one excuse to rage another war against the monsters this time...

  • Grillby x Reader: War Zone
    81.7K 3.3K 11

    The reader is a wizard, beings with the shape of humans but the magic of monsters. Wizards were forced into the war between humans and monsters by the humans. There, she meets the monster general, Grillby. Cover photo belongs to: http://ask-grillby.tumblr.com

    Completed  
  • Gaster x Reader- Not Your Fault
    106K 3.3K 13

    You're a human who has fallen down into the underground. There you meet a certain skeletal scientist and his sons. Will you get close to the family or will you become their enemy. Loosely based on TheBombDiggity666 Dadster comics (which you should totally check out if you haven't already) and occurs before frisk's ap...

    Completed  
  • Prisoner of War (W.D. Gaster X Reader)
    46.5K 1.7K 14

    You are one of the few humans with magic during a war between you and the monsters. (Pre Undertale) Instead of killed you wind up captured by the monsters where you meet a scientist and doctor W.D. Gaster. Cover... I drew it myself this time

  • A fire to my soul {Grillby x reader}
    1.2K 36 4

    You had been living in sowdin for a while, you decided it was time to get a job if you planned on staying with sans and papyrus. You decided to work at the nearby bar and restaurant grillbys your boss the owner was well is a good friend of his so you got the job quite easily, no strings attached. Your first day was as...

  • Blood, Dust and Tears | GRILLBY X READER |
    4.8K 138 3

    A Mobtale! AU oneshot where Grillby is kidnapped and tortured by the humans who just want to watch the monster world burn. How does the reader (a gang member who works for good old Uncle Gaster) and his daughter Fuku react?

    Completed  
  • A Bad Fuckin Temper (Underfell Sans X Female Reader)
    118K 4.5K 41

    You're 17,Your name is Y/N,You got a bad temper.You we're walking home,after a shitty day of school,you then heard a group of kids laughing. "The fuck is it now with those kids?"You walk towards them and see that they're picking on a smaller kid."Hey!Get the hell-"They look at me and the smaller kid starts running.The...

    Completed   Mature
  • Corrupted Love (ErrorFresh)
    147K 5.3K 26

    (Yes, I know this is a weird ship, but bear with me) Error and Fresh hate each other with every fiber of their beings. Fresh is annoying and manipulative, and Error is angry and rude. However, when Blueberry leaves the anti-void and the two are stuck together, they realize that the other may not be as bad as they once...

  • The Heat of a Soul
    30.5K 1.1K 15

    Sans has always been able to remember past timelines, for as long as he could remember. Never before has he been able to find a monster to confide in, to relieve the pain that echos through his mind at night, the memories that swallow him whole and torment him in his everyday life. That is, till now. (that was a lame...

    Completed   Mature
  • Chainsmoker [ Gaster!Sans x Reader ]
    30.5K 1.7K 15

    Routine. The entirety of every living thing is dominated by it, human or monster. Everything HAS to be the same. It was in this that you were the exception. For you everything was new, every time line a detailed altered in order to satisfy your sadistic desire for a new ending, whether it be only a few details of dial...

    Completed  
  • (Underfell sans x reader (female)) UNDERCOVER
    493K 17.3K 64

    You're a human that has fallen into Mt. Ebott on the year where all humans dress as monsters...Halloween. So how will the monsters know if you're a human or not?

    Completed