1 - 20 of 8,363 Works in Sans (Undertale)/Reader

Navigation

Listing Works

  1. Tags
    Summary

    As you walked you failed to hear the screams of terror of a bus going over 100 miles per hour and the sounds of it starting to bust down- it speeds near the sidewalk—the people in it shriek. Their blood curling screams didn’t occur to you, your headphone quality being way too good. Your shoulders relaxed as you stretched your limbs; very much unaware of the danger and pain that would very much make your life way more miserable. You should move out the way. But- likewise, you are unaware. Of death flickering and time excited to cut your strings.

    The bus is almost out of energy- and has been stopped.

    Or so people thought.

    It began to tilt- right where you were very much slowly walking. Andddddddddd—

    It didn’t crush you to death.

    Language:
    English
    Words:
    2,433
    Chapters:
    3/67
    Comments:
    2
    Kudos:
    20
    Bookmarks:
    3
    Hits:
    162
  2. Tags
    Summary

    You're living at Sans and Papyrus's house as their puppy (willingly)... because Papyrus wanted a pet, and Sans doesn't know what to feed humans. Dogs are easier to care for.

     

    (Author note: The reader isn't referred to as Y/N . I just use nicknames. No REAL Undertale spoilers are included; it's just Sans and Papyrus and a bit of info about you falling down and yada yada. You're implied to be over 18 but there's not a mention of being an adult. Oh, also, you are referred to with male pronouns strictly.)

    Language:
    English
    Words:
    1,331
    Chapters:
    1/?
    Kudos:
    2
    Hits:
    21
  3. Tags
    Summary

    A rewrite of a previous fic, changed structure and story and more Sans' to have sex with.

    Years have passed since the barrier had fallen and freed the monsters. You had your found family with them, Sans in particular being your best friend and support. You heard of SOULmates and how monsters have them, you wondered yourself if humans also had SOULmates, and you find out as you begin to travel through different Undertale AU's just how SOULmates and SOULs work through the multiverse.

    *I DON'T USE Y/N*

    Language:
    English
    Words:
    21,996
    Chapters:
    6/20
    Comments:
    7
    Kudos:
    48
    Bookmarks:
    24
    Hits:
    949
  4. Tags
    Summary

    Its been 6 years since monsters have been living on the surface,
    sans thought he could let go of what happened to him underground but his hatred for humans and itch for killing drives him to murder in secret.
    but after you came crashing into his life everything changed, how can he keep his true self from you?

    Language:
    English
    Words:
    3,621
    Chapters:
    1/1
    Kudos:
    25
    Bookmarks:
    2
    Hits:
    225
  5. Tags
    Summary

    The thing about soulmates is, no matter what pries them apart, they always...always find a way back together

    Chapters 1-3: Prologue
    Chapters 4+: Main Story
     

    *Chapters set to auto release every Saturday!

    *This is a rewrite of I Have The Power of Gaster AND Anime On My Side. Same concept, with a bit of a serious feel.*

    **Please be aware that this is not like my usual reader-inserts!! This story is in 3rd person pov, very vague description of a female reader. Unnamed (Pet names only). No use of y/n, y/e/c etc.**

    Language:
    English
    Words:
    72,516
    Chapters:
    10/?
    Comments:
    25
    Kudos:
    41
    Bookmarks:
    17
    Hits:
    537
  6. Tags
    Summary

    You're a grad student at a house party. How many skeletons are you running into there? At least one you didn't expect.

    (This explains nothing. Please read if you like Sans/Reader romance slice of life with plot, character relationships, fluff and eventual smut. Underfell headcannon is being used.)

    (Time for a second note to reemphasize PLOT. Drowning in plot. Plot for days. Send help.)

    Language:
    English
    Words:
    163,506
    Chapters:
    26/?
    Comments:
    913
    Kudos:
    497
    Bookmarks:
    125
    Hits:
    13,757
  7. Tags
    Summary

    You were so excited to finally get married to your long time fiancé, only for him to leave you for another girl with nothing but a note. Lucky for you, your two best friends were there to help you through this rough patch of your life.

    Series
    Language:
    English
    Words:
    14,510
    Chapters:
    13/?
    Comments:
    153
    Kudos:
    163
    Bookmarks:
    39
    Hits:
    3,556
  8. Tags
    Summary

    You need to stop staring at him.

    You could spend an eternity just watching him sway his hips along to some overly cheerful pop-song bubbling from his phone, (especially because Stretch is gone for the weekend working on something with Undyne, which means he can’t tease you for getting distracted by the cooler Serif,) but you know that eventually Val will catch you ogling him. Forcing your attention elsewhere, you help out by finding a pot, using the stepstool in front of the sink to be able to reach for the cold handle.

    (or, in which the reader falls victim to one of Stretch's traps set behind for his brother, and it leads to some shenanigans with your boyfriend.)

    Language:
    English
    Words:
    3,067
    Chapters:
    1/1
    Kudos:
    15
    Bookmarks:
    3
    Hits:
    128
  9. Tags
    Summary

    You are dying. Sans is dying. But together, you don't have to.

    Isekai WarAU that turns into a 14 skeleton story (no stripes or brother/brother are involved in romance.)

    Ask not for whom Truck-Kun honks, Truck-Kun honks for thee

    This is entirely plotted out and outlined but will not have a set release schedule

    Language:
    English
    Words:
    11,279
    Chapters:
    4/?
    Comments:
    5
    Kudos:
    40
    Bookmarks:
    15
    Hits:
    450
  10. Tags
    Summary

    Being the cleric of an inter-dimentional war isn't that bad once you get used to it.

    When a skeleton falls from a portal into your bedroom, rambling about things you'd always thought were fake, what would you do with everything he says? When he claims he needs to win a war against his very own brother, his bone and marrow, who are you to turn down his request to be his army's medic? When you realize you're falling ill, who are you to tell him something is wrong?

    Language:
    English
    Words:
    9,520
    Chapters:
    4/?
    Comments:
    3
    Kudos:
    11
    Bookmarks:
    2
    Hits:
    218
  11. Tags
    Summary

    You had a stalker. You knew you did. No one believed you but you KNEW you had a stalker.

    And you so desperately want to meet him.

    Series
    Language:
    English
    Words:
    1,995
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    32
    Bookmarks:
    1
    Hits:
    162
  12. Tags
    Summary

    IT'S THAT TIME OF THE YEAR!
    Kinktober time~!

    So yeh this is basically short drabbles of smut. Some will be longer, some will be shorter but I'm gonna try my best to make them juicy~

    --------------------------------------------------------------------------------

    Language:
    English
    Words:
    13,376
    Chapters:
    14/31
    Comments:
    1
    Kudos:
    31
    Bookmarks:
    5
    Hits:
    2,509
  13. Tags
    Summary

    You and your family are just enjoying a nice day at the park, when a life changing event happens that ruins everything.

    You get taken away to a facility to be tested on...

    Life doesn't feel as peaceful as it once did, you hated your new life.

    "I wish I could just go into those story books I used to read..."

    Language:
    English
    Words:
    106,931
    Chapters:
    17/?
    Comments:
    59
    Kudos:
    239
    Bookmarks:
    72
    Hits:
    5,778
  14. Tags
    Summary

    As a person, falling in love wasn't on the top of your priority list. If it happened, it happened, but you weren't all too bitter if it didn't. Maybe whatever social higher power wasn't too happy about that, so it just had to partner you up with some nerdy idiot who flew too close to the sun and ripped a self-shaped hole in the middle of reality itself.

    And then you also fell in love with his brother. Too bad that you aren't too up for polygamy.

    Inspired by Milk Tea and Souls by Lady_Flame96 and Soulfound by yeo_sin, Title inspired by Baile Involvidable by Bad Bunny

    Language:
    English
    Words:
    9,656
    Chapters:
    3/?
    Comments:
    6
    Kudos:
    23
    Bookmarks:
    7
    Hits:
    266
  15. Tags
    Summary

    It’s fun being dead.

    Or undead, rather, as your sister likes to correct you. Your dear sister is the kind of person who took her dark arts very seriously. Or, her necromancy, rather. You’ll be the first to admit, you don’t know a lot about her school of magic. She doesn’t know much about yours either, but it’s always enjoyable to discuss magical theory with her. She says it’s not her specialty, but she tends to under credit herself.

    Language:
    English
    Words:
    42,178
    Chapters:
    21/?
    Comments:
    20
    Kudos:
    93
    Bookmarks:
    35
    Hits:
    2,712
  16. Tags
    Summary

    So, I heard you like skeletons...

    Reader insert prompt fills for @skeletonh0e's sans-centric Kinktober challenge on tumblr

    Language:
    English
    Words:
    35,428
    Chapters:
    19/31
    Comments:
    41
    Kudos:
    246
    Bookmarks:
    26
    Hits:
    7,215
  17. Tags
    Summary

    While looking for a plant to use in an assignment, you encountered two giant skeletons in the woods. You were in shock, awed, and a little scared. Yet, somehow, you managed to befriend them??? Now, they were helping you out with your assignment, and you were learning so many things that a tiny college classroom couldn't effectively teach!

    Language:
    English
    Words:
    3,038
    Chapters:
    1/?
    Comments:
    1
    Kudos:
    9
    Bookmarks:
    3
    Hits:
    60
  18. Tags
    Summary

    Monsters have appeared from a mountain, in your town! Interested in this new development you head home with high hopes. Sadly it seems humans will be humans, and for some reason you keep getting caught in the cross fire. Luckily you've made some new friends to help you out along the way!

    You were just about to head into the nearby town when your phone went off, it was a text. From Otto of all people. A video of him, and what looked like monsters walking behind him. "You should come home (Y/n), things just got interesting."

    Reader is female (sorry) there will be smut at some point, don't know when though...

    Series
    Language:
    English
    Words:
    69,519
    Chapters:
    33/?
    Comments:
    246
    Kudos:
    303
    Bookmarks:
    55
    Hits:
    8,510
  19. Tags
    Summary

    Sans is the Bane Of Your Existence. Pranks and Puns haunt your days whenever he is near. Unfortunately, Papyrus is your best friend, and you'd do anything for him. Even if that means taking care of his brother after an experiment gone wrong turns him into a massive, and even lazier, house cat.

    Series
    Language:
    English
    Words:
    3,967
    Chapters:
    10/?
    Comments:
    11
    Kudos:
    93
    Bookmarks:
    17
    Hits:
    892
  20. Tags
    Summary

    Sometimes life throws you a curveball. For you, your curveball was going to bed looking like a human, and waking up looking like a monster.

    A skeleton monster to be precise.

    With the barrier breaking, a large surge of magic descended on the town you live in, and transformed you overnight. Unsure what to do with you, and the others changed, you're ushered into a facility until a monster with similar magic can take you to teach you how to wield the now uncontrollable magic you've been given. After waiting in this place for four years, you'd given up hope that anyone would ever want to take you.

    What a surprise for you when you find out that someone does. A lot of someones.

    Language:
    English
    Words:
    698,790
    Chapters:
    89/?
    Comments:
    4,458
    Kudos:
    4,592
    Bookmarks:
    1,040
    Hits:
    268,305

Filters

Filter results:
Submit

Include

?
Include Ratings
Include Warnings
Include Categories
Include Fandoms
Include Characters
Include Relationships
Include Additional Tags

Exclude

?
Exclude Ratings
Exclude Warnings
Exclude Categories
Exclude Fandoms
Exclude Characters
Exclude Relationships
Exclude Additional Tags

More Options

Crossovers
Completion Status
Word Count
Date Updated
Submit

Clear Filters

Navigation