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  • Save Point (Sans x Reader)
    114K 5.9K 124

    (Sans × Gender-Neutral! Parent! Reader || Slow Burn) Moving from a backwater town to a city bustling with human and monsterfolk alike, some things begin to change both for the better and the worse. What was left behind comes back to bite at you in the most unexpected times, current progress being put in danger as a re...

    Completed  
  • Wilted [ Sans x Flowerfell! Reader ]
    117K 4.4K 20

    You were afraid. For the first time in your life, you were truly afraid. You weren't afraid of the never-ending darkness that had now consumed you. You weren't afraid of the monsters underneath your bed. You were afraid of the flowers.

    Completed  
  • An Oath of Mercy || UnderFell Sans x Reader
    21K 832 14

    One clumsy moment and a broken leg are all it takes to leave you at the mercy of the very edgy and very hostile monsters of the underground. Thanks to your knowledge as a doctor (and oath to do no harm), you're able to convince the Great and Terrible Papyrus to keep you alive. But how are you going to find your way ba...

    Completed  
  • End of Time ( Sans x Reader)
    17.8K 619 24

    "Here at the end, it's just me and you. I know who you are, you remember who I am." Sans remembering you is the best that could ever happen to your broken SOUL... Maybe together you make this timeline the last one or your ways separate again.

    Completed  
  • Smol sans and a fangirl (a bitty sans x reader story)
    32.6K 1.2K 14

    This is an alternate version of you, from a different universe, and yes things in this universe will be different from your current universe. Anyways, now to the bitty part...so, how this version of you comes to meet bitty sans is...bitty sans winds up traveling from the bitty universe to this one, via running away an...

  • Sans Au x Bitty!reader Scenarios
    45.5K 1K 35

    (COMPLETED!!(with here and there new chapters) but mostly COMPLETED!!) i was makeing sans bitty x reader befor this and got bored so i made this instead please enjoy :) Classic Fell Swap Horror Nightmare Ink Error

    Completed  
  • Your Odd Neighbor (Horror Sans x Reader)
    98.3K 3.7K 19

    Y/N's best friend Blueberry (also known as Underswap Sans) invited them to move into the shared/connected apartment next door. They could hang out all the time! It's an awesome opportunity and the chances of it happening again are slim. Being closer to friends means a lot, especially in this tough life on the surface...

    Completed  
  • Alive (Yandere Fell Sans x Reader)
    34.3K 877 36

    ~Cringe~ You're Little Red Riding Hood, but you took a wrong turn while delivering cookies to grandmother's house. He isn't the wolf, he's a bear that eats wolves. A bear who got a little too attached to a certain little girl in a red hood. ••••old description•••• the moment that i met you, i knew that you where meant...

    Completed   Mature
  • Soul Mates (Sans x reader)
    215K 5.4K 30

    Uh

    Completed  
  • Forget Me Not (Dt Sans X Reader)
    29.4K 754 23

    It wasn't your fault you were in this situation. It just happened at random chance, now you were stuck in a loop. A endless repetitive loop of death and obsessive love. He wanted to keep you forever, and if it meant becoming a monster worse than anything, he'd be okay with it. After all, he LOVED you~ Heyyyyy Someth...

    Completed  
  • Just SING | Sans X Reader
    262K 7.5K 36

    --Long ago, two races ruled over Earth-- --HUMANS and MONSTERS-- --One day, war broke out between the two races-- --After a long battle, the Humans were victorious-- --They sealed the monsters underground with a magic spell-- --Many years later...-- --MT. EBBOT, 201X-- --Legends say that those who climb the mountain n...

    Completed  
  • Life is PURR- fect with you in it (sans x cat reader)
    10.1K 237 12

    After frisk freed monsters for the last time, sans began to get really bad depression. It got so bad that he wouldn't eat for days on end, making him weaker than he already is. Papyrus decided to get him a therapy pet to help him on (your birthday), when sans met the cat named y/n, he instantly grew attached to it. Th...

  • 【Angel of Blood】Underfell!Sans X Reader
    211K 6.1K 51

    Description: Once a long time ago, the multiverses were doing what they would normally do and were getting along just fine. Suddenly, it changed. Y/N L/N fell along with their parents into the Underground. In this world, it's LOVE or love.

    Completed  
  • You Promised (Sans x Depressed!Reader)
    37.6K 1.1K 5

    "Sans...you promised me..." "You promised you'd never leave me..." "Heh...I really am worthless, huh...?" "..." "I guess I should just let you be, then..." "Goodbye..."

  • I'll Save You (Sans x Abused! Reader)[FINISHED]
    86.9K 1.9K 21

    (Y/N)'s parents abuse her since she was the mistake in the family. MONSTERS has been released from the underground by Frisk. Frisk And (Y/N) go to the same college (Frisk is older in this). Little does (Y/N) know , she met someone who who cares for her. What will (Y/N) do??

    Completed  
  • Cryokinesis ╪ Sans X Reader
    152K 5.1K 48

    "Blue", a old friend gave her that nick namename. Her real name is Y/n L/n .y/n has secrets that she MUST keep a secret. Her secret? Well... It wouldn't be a secret if I told you. (Originally Ice Cold) Highest ranks #1 in Sans X Reader #331 in Fanfiction

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  • Sans X Reader~When the underground finds you, let it take you.
    69.1K 1.5K 24

    Have you ever thought about what it could be like as a hybrid? Ever think what it would feel like to lose your parents? To be hunted down every day of your surface life? What if that question could be answered? Well I've got an answer for ya. It can. So, when the underground finds you, let it take you. . . . So...Heya...

  • Mindless (Sans x Reader)
    89K 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  
  • Magic Humans and Monsters (Sans x Reader)
    13.7K 738 40

    -FIRST BOOK OF THREE- Ever since the War, magic humans have been training to kill all monsters when they escape. They've even built a special school designed for teaching young magic people how to use their powers for destruction. Y/N was a magic person, born of nonmagic parents. But Y/N is not a vicious person and d...

    Completed  
  • Stay Close to Me (Reader x Sans)
    1.7K 71 15

    You (y/n) have a lot of friends now that you have freed the monsters from the underground. Everyone seems to be happy with their lives. You decided you wanted to go visit your old monster friends from mt ebbot.

  • Demons Love [Underfell Sans x Demon-Reader]
    32.8K 686 24

    Y/N is a half Demon Half Human, who lives with her friend Amy. They moved to a little town recently where Amy has loads of friends, which is the reason both of u moved there. Now... Only Amy knows ur little secret about u being half demon. Also ur the type of gurl who is kinds shy sometimes, has MAJOR ANGER ISSUES...

    Completed  
  • A New Soul (Sans X Female Reader)
    182K 3.2K 31

    (Y/N) absorbed a monster soul when she was little, gaining skeleton powers. Many years later, (Y/N) and her sister Frisk fall into the underground, meeting Toriel, their new mother, Papy, Undyne, and of course Sans. Will (Y/N) and Sans finally realize that they have feelings for eachother, or will Asgore find (Y/N) be...

    Completed  
  • The music within us Sans x reader
    1.4K 110 11

    This is a rewrite of my other book Musical Souls, which is still up on my profile if you'd like to read it :) I'll add in a more personalized description as I get further in, but for now here's just a few little facts. This is a sans x reader! Pretty much normal Undertale Au but with a few small changes. Nothing to n...

  • You're My Sunshine (Sans x Reader)
    12.4K 329 21

    You find yourself at Grillby's thinking about a certain friend of yours. Of course, by an either amazing or cruel twist of fate, you get stuck having an overnight stay at Sans and Papyrus' house. While you're there, you happen to meet up with that comical friend of yours who thinks it's a good idea to hang out with yo...

    Completed  
  • Furtastic
    47.1K 1.5K 25

    A girl who has never seen the world outside of the lab sees it for the first time only to fall down into the underground. What will she find down there?

    Completed  
  • Power to Heal (Underfell!Sans X Reader)
    83.9K 3.3K 41

    You wanted to help but it was too late... So, you left. Tears filled your eyes as you thought of the one person that needed you the most... They were gone and it's your fault. You ran and ran trying to escape reality. You thought if you could run far enough or fast enough that you wouldn't have just lost everything...

    Completed  
  • At the Surface (Sans X Reader)
    504K 20.5K 62

    The monsters have finally made it to the surface and have been legalized to roam the surface as they please. The first couple of months have been spent as a paradise where humans and monsters have lived in peace and happiness. But as we all know, humans tend to be afraid of what they don't understand and the appearanc...

    Completed  
  • Puns ( Sans x reader )
    497K 16.3K 12

    Warning! There is a chance that there will be spoilers for the pacifist run of undertale. I recommend finishing that before reading this. There won't be any spoilers for the no mercy run, so don't worry about that! Also, don't worry about anything NSFW/lemon if that's not what you're into-there won't be any of that he...

    Completed  
  • Bruised To The Bone: (Sans x Reader)
    118K 3.8K 52

    (Y/N). A peculiar soul; A human core, with a skeleton's power. Her parents are ashamed of her, beating her every time they catch her using magic. One day, she accidentally hurts someone, and they bring her almost to the point of death, trapping her in her room. After the incident, time has begun to reset. Two months p...

    Completed  
  • C A N C E L { Sans X Reader }
    198K 7.6K 27

    How many times have you seen this world, how many resets does it take for you to give up hope? Does anything even matter after all this, does trying do anything? Will the struggle help at all, can I even believe in anyone anymore? The only thing keeping me going now is my resentment.