1 - 20 of 107 Works in Skeleton Sex (Undertale)

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  1. Tags
    Summary

    Have some Error Oneshots to either warm your heart and make you smile or clench your SOUL and make you cry!
    Sub!Error x Anyone

    Latest Update: ❤️ Error Sinshot: Relax~ (Errortic)
    Lust thinks Error needs some TLC, especially since it's his birthday.

    (AUs or characters doesn't belong to me unless I said so. Undertale belongs to the one and only Toby Fox, and it's AUs belongs to their wonderful creators out there. I only own the story and the plot. The characters' characteristics will change and be altered for the sake of each and every story.)

    Language:
    English
    Words:
    50,160
    Chapters:
    26/?
    Comments:
    92
    Kudos:
    322
    Bookmarks:
    28
    Hits:
    7938
  2. Tags
    Summary

    It has been a couple hundred years since the monsters have been trapped Underground and no human have trespassed the underground since. Without a human soul, the monsters must turn to their own magical power to find a way out.
    WingDings Gaster and his two sons make several attempts to safely break the barrier, using experimental magics and ancient texts. Their repeated failures over time have left Gaster barely being able to hold on to the physical plane.
    One night, the two brothers make a new attempt and somehow manage to summon a very confused human to the Underground. Their victory is short-lived however, when the brothers soon realize the human’s soul is broken, shattered in the summoning process, and not strong enough to be used against the barrier.
    Gaster takes it upon himself to exchange half of his soul with the human’s, hoping he can heal one half enough for the soul to be usable. Taking in half of the powerful monster’s soul in return, the human suffers quite a side effect: turning into a skeleton monster!
    Sans and Papyrus are tasked with watching over the human now turned skeleton while Gaster heals their soul.

    Language:
    English
    Words:
    4,760
    Chapters:
    2/2
    Kudos:
    3
    Hits:
    35
  3. Tags
    Summary

    It started with a kiss, how the fuck did it end up like this? Their deal was sex. That was it. Sex kept separate from their 'jobs'. The line was perfectly clear! Until it wasn't...

    Language:
    English
    Words:
    179,859
    Chapters:
    40/?
    Comments:
    364
    Kudos:
    595
    Bookmarks:
    42
    Hits:
    9847
  4. Tags
    Summary

    Red moves back home with his tiny tot of a son, owning a book shop and expecting just the normal ins and outs of every day life. An out of towner comes in, and Red only expected a little flirting, maybe some teasing but not a sudden and swift change to everything he's ever known in his life!

    (Based on all Hallmark movies everywhere)

    Series
    Language:
    English
    Words:
    17,705
    Chapters:
    10/?
    Comments:
    130
    Kudos:
    76
    Bookmarks:
    15
    Hits:
    882
  5. Tags
    Summary

    The skeleton's find themselves in trouble. Danger threatens the entire world and all the alternate universes, the skeletons realized that they desperately need help as soon as possible. And who better to get than you, the reader?!

    Join the Undertale's skeleton duo and their alternate selves on this journey of saving the world, falling in love and the road to recovery. Every single universe is relying on you... can you handle that extra weight on your shoulders?

    (Reader has a few issues and they go through a lot in this story! If your okay with being dragged through hell and back, then proceed! You shall be rewarded fun times and skeletons lovers for putting up with angst and cliff hangers! Enjoy!)

    (UPDATING AND BACK AGAIN! SORRY FOR THE WAIT!)

    Series
    Language:
    English
    Words:
    82,568
    Chapters:
    52/52
    Comments:
    1433
    Kudos:
    896
    Bookmarks:
    138
    Hits:
    16828
  6. 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:
    18,133
    Chapters:
    6/?
    Comments:
    18
    Kudos:
    80
    Bookmarks:
    23
    Hits:
    828
  7. Tags
    Summary

    Chaos: Self indulgent fluff and sin! I like me a good reverse harem fic, and what better than a reverse harem fic where one skele gets the other nine?

    Zion: This entire thing is just my gift to Chaos who wanted a skele only harem fic. If anything is questionable well, blame her xD the whole thing is just to indulge my partner.

    Language:
    English
    Words:
    42,512
    Chapters:
    5/69
    Comments:
    23
    Kudos:
    87
    Bookmarks:
    21
    Hits:
    1246
  8. Tags
    Summary

    Loosely based on the canon of the show with some added characters.

    Ulma Alain Odle has always thought of Nazarick as her second home. Now stuck in her new reality with her adopted brother Momonga and her brother Ulbert's legacy to carry on, how will she survive this new world?

    Language:
    English
    Words:
    98,873
    Chapters:
    17/?
    Comments:
    163
    Kudos:
    281
    Bookmarks:
    71
    Hits:
    4858
  9. Tags
    Summary

    Between two part-time jobs and coursework, you don’t have time to look for a serious vanilla relationship - much less something more suited to your tastes. Turns out a certain Mutt didn’t get the memo.

    Shameless reader-insert fic, where a misunderstanding in the S&M club where you work as a bartender leads to sexy, kinky shenanigans with everyone's favourite Swapfell brothers (and a few more monsters on the way~).

    Slow-build: this was meant to be a PWP, but… I think it may develop a plot. SwapFell Papyrus (Mutt), SwapFell Sans. This is what happens when I can’t find enough stories featuring Mutt, apparently. I’m... sorry? #SorryNotSorry

    Language:
    English
    Words:
    29,645
    Chapters:
    11/?
    Comments:
    124
    Kudos:
    418
    Bookmarks:
    92
    Hits:
    4864
  10. Tags
    Summary

    Horny tales of a cringe AU of my own creation, LustFell. Where the monsters are horny, they all want to fuck you, but they also want to kill you! How conflicting!

    Language:
    English
    Words:
    2,390
    Chapters:
    1/?
    Comments:
    5
    Kudos:
    107
    Bookmarks:
    15
    Hits:
    1220
  11. Tags
    Summary

    Failure. Reset. Failure. Reset. Failure. Reset.

    This time, you fall into the Underground weeks before the 'Eighth' Human child arrives. But you’re not a child. And not many monsters expected to see an adult human in the Underground... not even Sans. You definitely aren’t supposed to be here.... or maybe you are? Maybe you’re the anomaly that can finally stop this endless cycle of resets?

    Or maybe you'll just get stuck in it with the rest of them.

     

    The “reader” is technically a young adult (twenties), female OC whose story is told through the second person. This was done to keep the story's POV similar to the game's POV.

    Language:
    English
    Words:
    25,937
    Chapters:
    13/?
    Collections:
    4
    Comments:
    126
    Kudos:
    414
    Bookmarks:
    80
    Hits:
    3438
  12. Tags
    Language:
    English
    Words:
    1,034
    Chapters:
    1/1
    Collections:
    1
    Comments:
    4
    Kudos:
    3
    Bookmarks:
    1
    Hits:
    29
  13. Tags
    Summary

    Rea (OC Read in 2nd Person ) is a mage sent to travel the void by the mages council, in charge of sealing and defeating anything that escapes.
    Stumbling onto a new universe, the Ebott barrier is closed and she confronts Asgore docilely about the monsters coexisting with the humans.
    Choosing a side, she is accompanied by a very untrusting group or monsters and a child whos magical abilities could throw her world into a mess of dangers and risks.

    Language:
    English
    Words:
    160,268
    Chapters:
    18/?
    Comments:
    79
    Kudos:
    138
    Bookmarks:
    21
    Hits:
    1547
  14. Tags
    Summary

    This is a story about a depressed human who woke up from a coma and is in another universe fron her favorite video game. Though they aren't alone either

    Language:
    English
    Words:
    15,478
    Chapters:
    7/?
    Comments:
    12
    Kudos:
    83
    Bookmarks:
    20
    Hits:
    902
  15. Tags
    Summary

    The skeleton's are still in trouble, but at least they have their wonderful Reader around again. And they aren't planning on letting her leave, ever again. Danger still threatens the entire world and all the alternate universes, but hey; at least romance is starting to blossom in the household. Even if they are fighting over you. Oh joy...

    Join the Undertale's skeleton duo and their alternate selves on this journey of saving the world (STILL), falling in love (HARD) and the road to boning a few skeletons (WAIT WHAT). Every single universe is relying on you... can you handle that extra weight on your shoulders? As well as the weight of your heart and soul as you fall deeply in love with them and adjust to a normal life now than you remember who you are and try to find your place in the world... sounds like fun, right?!

    (THIS IS THE SECOND BOOK IN THE SERIES!!!)
    (I recommend you go and read the first book, named Guardian of Bones, which is complete. Although, feel free to skip that and go straight into this. Just don't be surprised if there's a few pieces that you don't understand)
    (Also please leave comments! I love hearing what everyone thinks! :D)

    Series
    Language:
    English
    Words:
    2,603
    Chapters:
    1/?
    Comments:
    17
    Kudos:
    81
    Bookmarks:
    15
    Hits:
    1077
  16. Tags
    Summary

    This is a collection of my participation of kinktober 2019.
    The prompts list is linked on the first chapter.

    Language:
    English
    Words:
    4,546
    Chapters:
    4/31
    Collections:
    2
    Comments:
    2
    Kudos:
    58
    Bookmarks:
    5
    Hits:
    2030
  17. Tags
    Summary

    Razz is grateful for Sans.

    Series
    Language:
    English
    Words:
    2,235
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    45
    Bookmarks:
    1
    Hits:
    621
  18. Tags
    Summary

    desacordamiento: De desacordar.

    desacordar: prnl. Olvidarse, perder la memoria y acuerdo de las cosas.

     

    Series
    Language:
    Español
    Words:
    2,513
    Chapters:
    2/?
    Kudos:
    12
    Hits:
    264
  19. Tags
    Summary

    Mutt was in heat.

    Normally, he could deal just fine. He'd get himself off, find someone willing, or just power through it. But now that there was a human living in the house, he was finding it hard to control himself.

    Too bad said human finds out by accident.

    Language:
    English
    Words:
    4,353
    Chapters:
    1/1
    Collections:
    1
    Comments:
    16
    Kudos:
    307
    Bookmarks:
    30
    Hits:
    4480
  20. Tags
    Summary

    “Im gonna do something to you and I want you to keep quiet”

    Language:
    English
    Words:
    2,909
    Chapters:
    1/1
    Comments:
    5
    Kudos:
    51
    Bookmarks:
    12
    Hits:
    1011

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