1 - 20 of 4790 Works in Sans (Undertale)/Reader

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  1. Tags
    Summary

    You were here when monsters were trapped Underground.

    And you are still here when they were freed.

    You want to learn more about monsterkind. But being a mage make it dangerous. What if someone finds out your little secret ? Will you be able to hide it from your new friends ? And from those nosy skeletons ?

    Language:
    English
    Words:
    35,789
    Chapters:
    8/?
    Comments:
    42
    Kudos:
    125
    Bookmarks:
    22
    Hits:
    1439
  2. Tags
    Summary

    You doubt you're worth anyones' time.
    You have more secrets than redeeming qualities.
    But the universe demands you meet your soulmate in a bakery, issues and all, and it's up to you to decide if you can do it.

    Edit: how the actual heck does this have 120+ kudos thank you guys

    Language:
    English
    Words:
    25,135
    Chapters:
    11/?
    Comments:
    117
    Kudos:
    135
    Bookmarks:
    25
    Hits:
    1989
  3. Tags
    Summary

    You and your little bro got kicked out of your apartment. Your new monster friend helped you find a place. Now you live with skeleton brothers. Not until a successful breakthrough, you now live with multiple skeleton brothers from different alternate universes until they find a way to get back home. An arduous task it is.

    Alternate Title: Alternate versions of the skele-bros are taking over your universe because Sans can't keep his freaking curiosity to himself.

    Season 1 (1-57): finished
    Season 2 (58-?): ongoing

    Language:
    English
    Words:
    185,747
    Chapters:
    78/?
    Comments:
    1873
    Kudos:
    1740
    Bookmarks:
    202
    Hits:
    31637
  4. Tags
    Summary

    At first, it seemed like a dream come true when your old friend offered to let you live with her and her..... friends? in their big ole house during college. For a small amount of rent of course, it was the cheapest option by far. But.... then... you started seeing behind the curtain....
    .... And you really didn't like what you saw....

    Language:
    English
    Words:
    2,253
    Chapters:
    1/?
    Comments:
    7
    Kudos:
    39
    Bookmarks:
    10
    Hits:
    252
  5. Tags
    Summary

    After being missing for far too long, you reunite with Frisk. But they aren't alone and the world has to come to terms with the existence of monsters. Fighting alongside Frisk as co-ambassador to monsters, you start to notice things. Like how Frisk has not only grown mentally but seems to be keeping something from you (Not that you are any better, everyone has skeletons in their closet), or how attached to 'goat mama' they are...

    Or how it seems every time that you see a skeleton, your heart starts to pound and your hands get sweaty and your head feels weird and - oh god, how many skeletons are living with you?!

    Language:
    English
    Words:
    16,000
    Chapters:
    5/?
    Comments:
    13
    Kudos:
    56
    Bookmarks:
    17
    Hits:
    643
  6. Tags
    Summary

    We all know how this story goes, well I'm here to really turn it on its head.

    Your lives are story's waiting to be told, in search of silver lines we discover gold,
    A child from a village with a built history so now facing an unknown fate and has a dark truth to live with but being blinded to it their whole life, the world of monsters is here to shed some light, Chara-cter, Paci-Frisk and MAX-imum hp.

    Chapter One: 1 - ???
    Chapter two: ??? - ???

    Language:
    English
    Words:
    3,123
    Chapters:
    3/?
    Comments:
    1
    Kudos:
    6
    Bookmarks:
    2
    Hits:
    39
  7. Tags
    Summary

    You’re just a shy young woman who works at a small bookstore in Ebott City, who has never attempted to climb out of her introverted shell before.

    Or maybe you’re a sassy young woman who lost her job after sticking up for monster rights in front of your racist boss.

    Or possibly you’re a traumatized young woman, with a painful past full of abuse and a broken body full of secret scars.

    You might even be an ordinary-looking young woman, who nevertheless possesses magical abilities and a SOUL far different from a regular human’s.

    Whoever you are, there are ten skeletons in your town who are NOT going to let you live in their house.

    Follow the entire Undertale AU gang as they try to live their normal lives in a house full of volatile personalities, all while dodging the attentions of four persistent Readers, in a desperate attempt to not let their new life on the surface get dragged into a reverse-harem trope. Cuz ain’t nobody got time for that.

    (Since I'm a professional illustrator by day, expect lots of art of this series, both here and on tumblr!)

    Language:
    English
    Words:
    19,941
    Chapters:
    6/50
    Comments:
    112
    Kudos:
    53
    Bookmarks:
    15
    Hits:
    816
  8. Tags
    Summary

    You work at a small cafe in a nice neighborhood where everything is peaceful and beautiful. Unfortunately, you don't live there, but in a poor, disgusting, filthy apartment where you struggle to live.
    Hey, but who knows what luck brings you?

    Language:
    English
    Words:
    8,097
    Chapters:
    4/?
    Comments:
    4
    Kudos:
    13
    Bookmarks:
    3
    Hits:
    239
  9. Tags
    Summary

    It's a beautiful day outside. The birds are singing, the flowers are blooming.

    On days like these, humans like you...

    Like to take a stroll under the sun!

    Life is a rollercoaster. Things happen. Right now, your ride's a breeze. You feel the wind brushing your cheeks, and you're going in a relatively leisure pace. You have friends, and that includes two skeletons: Sans and Papyrus. Regarding monster friends, those two are the closest you've got, particularly Sans. You meet him quite regularly, though lately he's kinda disappeared from your daily life... But you know he's busy, and you can be patient.

    And hey, you meet a new face!

    Well, skull, but that's besides the point.

    Language:
    English
    Words:
    18,644
    Chapters:
    3/?
    Comments:
    20
    Kudos:
    67
    Bookmarks:
    10
    Hits:
    511
  10. Tags
    Summary

    You wake up one morning and don't quite feel like yourself. Turns out that there's a pretty simple explanation for that. You aren't. Instead, you find yourself in the body of a big scary looking skeleton monster. Turns out soulmates are real, and you just happen to be part of that small percentage that has one and it just has to be the bodyswap one.

    Language:
    English
    Words:
    5,148
    Chapters:
    2/?
    Comments:
    8
    Kudos:
    30
    Bookmarks:
    3
    Hits:
    160
  11. Tags
    Summary

    We've all heard of that cliche trope where the main character is suddenly thrown into a whole new world that they've read about or watched; so waking up in that exact situation with a very familiar skeleton monster calling you brother wasn't completely out of left field.
    Except it was, and this isn't normal Undertale- This is your Undertale. Worse yet, you never finished this world, and that's caught someone's attention.

    Language:
    English
    Words:
    14,964
    Chapters:
    12/?
    Comments:
    45
    Kudos:
    100
    Bookmarks:
    17
    Hits:
    782
  12. Tags
    Summary

    Smol Innocent Blueberry Muffin

    Language:
    English
    Words:
    12,286
    Chapters:
    26/27
    Comments:
    258
    Kudos:
    760
    Bookmarks:
    21
    Hits:
    20575
  13. Tags
    Summary

    All he'd expected was a short trip to the park. Nothing more, nothing less.

    Obviously, as all things are, it didn't end up that way.

    Now here he is, at the hospital, with Tori's kid and he has no idea how the heck he's supposed to explain this to her.

    And that's not even mentioning you.

    Of course, out of all days, it just has to be today at the exact same hospital that he meets his soulmate.

    Language:
    English
    Words:
    1,605
    Chapters:
    2/?
    Comments:
    12
    Kudos:
    35
    Bookmarks:
    3
    Hits:
    208
  14. Tags
    Summary

    While on a walk around town, you stumble upon a little monster. You decide to take him home with you. There might be more to him than you thought.

    Language:
    English
    Words:
    2,677
    Chapters:
    4/?
    Comments:
    1
    Kudos:
    25
    Bookmarks:
    4
    Hits:
    266
  15. Tags
    Summary

    Sans doesn't know why he was attacked, he's so scared- He can't believe what's happened to him, and yet- Why is Red so kind? And what is this warmth in his soul...? He's never felt it before...He wants...to be close to Red. But he shouldn't want that, right? He should be disgusted with Red for what he's done to him!! And yet...Sans is only disgusted by himself...for he...doesn't want to let Red go...
    Red has a job, a job that he quite enjoys. He gives people their darkest desires. Some breaking and entering that ends in sexy time? Sure. Some heavy BDSM? He's down. Some rape play? He's cool with that. He was commissioned for a cute, small skeleton- And damn, was he excited. They were adorable, so small in his arms... But...their sobs were a bit too loud...Their shaking too real... They would say the safe word, right? They would stop this, right? Why aren't they stopping this? Just say the word!
    "Peppercorn", Red says, his voice hoarse as he looks into the sobbing monster's eye-lights.
    "...that's...a spice, right?" They responded between choked noises.

    Language:
    English
    Words:
    19,119
    Chapters:
    13/?
    Comments:
    297
    Kudos:
    273
    Bookmarks:
    39
    Hits:
    3108
  16. Tags
    Summary

    You fell asleep on your couch and woke up in a different universe.

    Turned into a skeleton.

    And are now helping a Fallen monster become whole again.

    All the while living with six loud energetic skeletons.

    You still dont know if you should laugh or cry.

    Language:
    English
    Words:
    7,749
    Chapters:
    7/?
    Comments:
    18
    Kudos:
    92
    Bookmarks:
    15
    Hits:
    668
  17. Tags
    Summary

    Falling.
    Is this what it’s like to die?
    Scratching.
    I don’t want to fall away.
    I hear him call for me and my head stops hurting.

    Too bad I only see him when I’m asleep. Maybe if he was always around, the world wouldn’t shake and I wouldn’t be falling.
    But here I am, falling into the darkness that is my soul.

    Language:
    English
    Words:
    4,491
    Chapters:
    4/?
    Kudos:
    5
    Bookmarks:
    3
    Hits:
    79
  18. Tags
    Summary

    All your life you were told one thing, and that was you were to never visit the mansion; a place owned by your family for generations. Now a full adult, and your parents gone to live a better life, the forbidden mansion is yours, as well as the tenants residing there. What's the first thing you do after inheriting the estate? You visit it. Screw the rules right? It's not like anything bad will happen. You are a big girl; you can take care of yourself. Your new tenants seem to think otherwise. Not only are those living here are weird but this entire mansion feels...off. Maybe it's haunted....maybe

    Language:
    English
    Words:
    45,294
    Chapters:
    12/?
    Comments:
    132
    Kudos:
    322
    Bookmarks:
    85
    Hits:
    4781
  19. Tags
    Summary

    How could she know that opening that bag left outside her place could change so much. That one dark hurt bitty would flip her world, her whole life was changed she just didnt know it yet.

    Language:
    English
    Words:
    88,399
    Chapters:
    17/?
    Comments:
    338
    Kudos:
    530
    Bookmarks:
    103
    Hits:
    7556
  20. Tags
    Summary

    The Monsters are stressed with the government trying to take Frisk away as “nicely” as they can, but they never expected the government to pull their trump card...Frisk’s biological mother.

    Language:
    English
    Words:
    47,798
    Chapters:
    23/?
    Comments:
    34
    Kudos:
    61
    Bookmarks:
    9
    Hits:
    510

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