1 - 20 of 500 Works in Ecto-Vagina (Undertale)

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  1. Tags
    Summary

    They just wanna go on a date without Sans getting harrassed man- So at first its superrrr fluffy foreplay, then Sans says a Lil sum not knowing what it meant, and a bitch got wrecked- At the end, PREGANANANANANANT----

    Series
    Language:
    English
    Words:
    1,828
    Chapters:
    1/1
    Hits:
    9
  2. Tags
    Summary

    Blue was expecting a nice, quiet neighborhood for himself and the others to live. What he wasn't expecting was a mage Alpha to be living in the same area. Or for her to take an interest in him during her heat.

    But was that such a bad thing?

    Language:
    English
    Words:
    15,000
    Chapters:
    5/5
    Comments:
    10
    Kudos:
    106
    Bookmarks:
    14
    Hits:
    1221
  3. Tags
    Summary

    Sans discovered Nightmare pulls off skirts nicely.

    Series
    Language:
    English
    Words:
    1,802
    Chapters:
    1/1
    Comments:
    34
    Kudos:
    34
    Bookmarks:
    4
    Hits:
    188
  4. Tags
    Summary

    You find yourself out of a job, on the verge of getting kicked out of your apartment because you can't pay the rent and no where to go. Until your newest skeleton friend suggests you move in with them and their cousins until you get back on your feet again. You didn't expect to like living with this many people at once so much though...

    Language:
    English
    Words:
    180,975
    Chapters:
    43/?
    Comments:
    997
    Kudos:
    2127
    Bookmarks:
    375
    Hits:
    38133
  5. Tags
    Summary

    Trapped apart in different universes with only a cellphone router to keep them connected, Sans has a gift for Papyrus.
    A neat new toy that he encourages Papyrus to play with.
    And who is Papyrus to say no?

    (Note: Underfell Sans and Underswap Papyrus are referred to as their canon names in this fic.)

    Language:
    English
    Words:
    6,062
    Chapters:
    1/1
    Comments:
    14
    Kudos:
    74
    Bookmarks:
    9
    Hits:
    382
  6. Tags
    Summary

    Born of the void, a being not meant to exist outside its darkness. What will become of the worlds he touches...

    Language:
    English
    Words:
    36,296
    Chapters:
    7/?
    Comments:
    35
    Kudos:
    85
    Bookmarks:
    22
    Hits:
    1370
  7. Tags
    Summary

    They defeated Crown but payed an heavy price.
    Cherry and the Font family have to learn to live with it and recover from traumas.
    But some monsters don't agree with Cherry and Butcher's being a couple...

    Series
    Language:
    English
    Words:
    80,793
    Chapters:
    26/29
    Comments:
    6
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    402
  8. Tags
    Summary

    The monsters are free...

    and the cost of living is expensive.

    Papyrus is tired of seeing his brother work himself to death to keep them afloat. He decided to put some work in as well. Things spiral when Sans finds out.

    Language:
    English
    Words:
    2,390
    Chapters:
    2/?
    Kudos:
    12
    Bookmarks:
    2
    Hits:
    190
  9. Tags
    Summary

    Fox watches his brother be taken by a mysterious black figure, unable to save him in time he follows them into a rift. Instead of ending up in the same place as his brother and the mystery kidnapper, he wakes up in a familiar forest. Though something seems wrong here, he isnt in his AU Anymore. So where did he end up.. and where is his brother?

    Language:
    English
    Words:
    5,009
    Chapters:
    2/?
    Kudos:
    3
    Bookmarks:
    1
    Hits:
    156
  10. Tags
    Summary

    So many twitter inspired posts...Anyway here's Nightmare in his lil submarine getaway because he's in heat :)
    Dream is gonna bring help! Why food? IDK :D

    Language:
    English
    Words:
    6,195
    Chapters:
    4/?
    Comments:
    35
    Kudos:
    92
    Bookmarks:
    29
    Hits:
    1281
  11. Tags
    Summary

    (Y/n), a high ranking Platoon Commander in the Military, was on a mission with her squad when her plane was shot down by an enemy ship, leaving her stranded on an unknown island, with none of her comrades in sight.

    It would have been all fine an' dandy... if she wasn't surrounded by three Alpha Skeletons and one Omega Skeleton. All of which want to fuck or be fucked by her.

    So now here she is, having to assess her dominance as an “Alpha” to get by with her limbs still attached and her clothes still in one piece. Even if one of them looks like he came straight from Satan's asshole.

    Language:
    English
    Words:
    107,019
    Chapters:
    37/?
    Comments:
    1273
    Kudos:
    3378
    Bookmarks:
    429
    Hits:
    61460
  12. Tags
    Summary

    Commission for Mads_tasteful_nudes for a Matter of Intent spinoff! This would take place a few months after Unwinding (chapter 28).

    Mind the tags and be extra careful for noncon, needles, drugging, cum milking, forced sibling incest, sensory deprivation, bondage in a small container, implied non-consensual forced cum feeding, implied breeding/pregnancy, abortion mention, unhealthy guilt, and learned helplessness

    This chapter was beta'ed by @ soul_scum on Twitter / undertailsoulsex on AO3!

    Language:
    English
    Words:
    2,123
    Chapters:
    1/1
    Comments:
    6
    Kudos:
    26
    Hits:
    593
  13. Tags
    Summary

    (This is set in underverse , just after cross had fought with classic , ink and red. The exact time is when he's in that little rotten house , knocks chara unconscious and nightmare turns up. We know that nightmare had warned cross but what if he warned him in a different way)

    Language:
    English
    Words:
    3,042
    Chapters:
    1/1
    Comments:
    5
    Kudos:
    42
    Bookmarks:
    5
    Hits:
    417
  14. Tags
    Summary

    Sans fails a teleport and ends up stuck in a wall.

    Grillby approves.

    Series
    Language:
    English
    Words:
    1,195
    Chapters:
    1/1
    Kudos:
    34
    Bookmarks:
    5
    Hits:
    505
  15. Tags
    Summary

    "Un petit sourire apparu sur le visage de Papyrus. Tout allait bien se passer. Les deux petits squelettes étaient les personnes les plus attentionnées qu'il connaissaient. S'ils lui avaient proposé de venir passer l'après-midi avec eux, ce n'était pas pour lui faire du mal. Ils étaient ses amis et ils se préoccupaient de son bien-être. Ils étaient des Sans après tout, le Magnifique et le Malveillant Sans qui plus est !"

    Undertale French fic.
    The first fic i'll post here but not the first i have written. It's still in french but i'll translate it in English soon.

    Language:
    Français
    Words:
    8,878
    Chapters:
    1/1
    Comments:
    2
    Kudos:
    4
    Hits:
    41
  16. Tags
    Summary

    First thing I've written in years, I'm not a great writer either so please don't be cruel. It's Underswap PWP with bad Stretch (no beta).

    Title is a quote I found by unknown source.

    Language:
    English
    Words:
    7,088
    Chapters:
    2/?
    Comments:
    7
    Kudos:
    35
    Bookmarks:
    5
    Hits:
    449
  17. Tags
    Summary

    Gaster comes to terms with his feelings for Asgore after a casual meeting became too much for him. Then they frick.

    I'm bad at summaries lol.

    Language:
    English
    Words:
    8,309
    Chapters:
    2/2
    Kudos:
    10
    Bookmarks:
    2
    Hits:
    128
  18. Tags
    Summary

    I'll be posting lemons here now and again when I get bored. -p-

    Language:
    English
    Words:
    6,261
    Chapters:
    7/7
    Comments:
    13
    Kudos:
    55
    Bookmarks:
    6
    Hits:
    1025
  19. Tags
    Summary

    Ink and Dream learn to knock before entering... afterall there might be SMUT inside

    Language:
    English
    Words:
    1,321
    Chapters:
    3/3
    Comments:
    47
    Kudos:
    49
    Bookmarks:
    5
    Hits:
    465
  20. Tags
    Summary

    Fell is a UF! Papyrus living in Bayou City working at Firepit Pub. UT!Sans works in a lab with Doctor Gaster.

    Sans has a bad day at work because of his asshole boss, whom he is also dating. He calls his friend, Cyan to talk about what is going. Cyan tells Sans to go to Fire Pit Pub where his neighbor’s brother works. “Ask for Fell”

    That night Fell meets a new face at the pub, Sans. He tries everything he can to make that sweet skeleton smile. Somehow Fell is falling for a monster that is already spoken for by a fucking prick.

    Series
    Language:
    English
    Words:
    1,135
    Chapters:
    1/?
    Comments:
    5
    Kudos:
    14
    Bookmarks:
    2
    Hits:
    96

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