1 - 20 of 1020 Works in Ecto-Penis (Undertale)

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  1. Tags
    Summary

    Sans is stuck taking the train late at night. His heat decides to start and he meets a stranger willing to help him...

    Series
    Language:
    English
    Words:
    233,448
    Chapters:
    43/?
    Comments:
    431
    Kudos:
    239
    Bookmarks:
    41
    Hits:
    4920
  2. Tags
    Summary

    You've lost focus. Ink wants to know why, and he's determined to get it out of you.

    Series
    Language:
    English
    Words:
    29,393
    Chapters:
    10/?
    Comments:
    166
    Kudos:
    163
    Bookmarks:
    35
    Hits:
    2395
  3. Tags
    Summary

    In which Red suffers the seasonal wrath of monster biology, and reader embraces their hidden talents as a heat sink.

     
    Reader has a vagina, no gendered language is used.

    Language:
    English
    Words:
    4,622
    Chapters:
    1/1
    Comments:
    9
    Kudos:
    100
    Bookmarks:
    13
    Hits:
    1028
  4. Tags
    Summary

    The original universe and Underswap has now arrived in Underfell in a multiversal merge. Stretch must now tell King Edge the events that transpired in his own universe while the Royal Family adjusts to the jarring event.

    _______________________________
    Sequel to Karmic Retribution.
    _______________________________

    *This is my personal take on the Underswap AU. I hope you enjoy it as much as I am enjoying writing it! Please feel free to write or draw for this story, you don't need my permission for that.

    Series
    Language:
    English
    Words:
    3,167
    Chapters:
    3/?
    Comments:
    183
    Kudos:
    357
    Bookmarks:
    82
    Hits:
    4351
  5. Tags
    Summary

    With Monsters finally on the surface, Sans is looking for a purpose. Finding an interesting soul, curiosity digs its claws in deep, causing him to stumble and fall and fumble his way through a friendship with an intense side of attraction. Could she become his purpose?
    Going to try to be a slow burn, lots of drama and angst, topped with eventual smut and romance. Seriously intense attraction and denial.

    Language:
    English
    Words:
    9,270
    Chapters:
    6/?
    Comments:
    3
    Kudos:
    5
    Bookmarks:
    4
    Hits:
    125
  6. Tags
    Summary

    (Y/N) is the second in command of the crew she was in. You were shown respect for it as being in second in command wasn't easy. You were on a ship going to enemy's land.

    Then something happened.
    You can't remember much other than a huge explosion happening on the ship.

    When you awoken you're stranded on a semi-huge island.
    The Island seems wild and unsafe to a soldier like you but you will do anything in your power to survive.

    Even if it means bumping into skeletons who have a thing for you on the journey to survival.

     

    (Updates once in a week Fridays; thank you for reading and supporting me! )

    Language:
    English
    Words:
    11,428
    Chapters:
    10/?
    Comments:
    75
    Kudos:
    230
    Bookmarks:
    39
    Hits:
    2722
  7. Tags
    Summary

    You find yourself in a whirlpool of regret when you have a one night stand with a random skeleton who you hit it off with after your boyfriend cheats on you. Your anxiety has worsened and made it impossible for you to be alone, but you won’t tell anyone that.

    Language:
    English
    Words:
    10,852
    Chapters:
    6/?
    Comments:
    14
    Kudos:
    41
    Bookmarks:
    14
    Hits:
    299
  8. Tags
    Summary

    Sans' heat had come up and you were more then willing to help. The only problem was that he was feral during heats and in order to help him you would have to spend the entire week trapped in the bunker with him. And as Sans' had told you many times before, you're too determined for you're own good.
    Gender Neutral for everyone's enjoyment!

    Language:
    English
    Words:
    2,919
    Chapters:
    1/1
    Comments:
    9
    Kudos:
    127
    Bookmarks:
    5
    Hits:
    995
  9. Tags
    Summary

    Space travel could be incredibly boring truth be told.

    At least Mutt has found himself some entertainment in the form of two cute twins that have no idea they are caught in his cross hairs.

    Language:
    English
    Words:
    4,478
    Chapters:
    1/1
    Kudos:
    30
    Bookmarks:
    8
    Hits:
    392
  10. Tags
    Summary

    You are a day-care worker and you absolutely love your job. You get to teach and learn from the kids you work with, both monster and human children. If you could describe your current life in one word, it would be average. Not that you mind.

    That all changed, after you met a skeleton at the diner. And then another, and another....and another.....

    You never knew that life could be interesting.

     

    CrazyBunnylady and TheMsource inspired me to start writing. I promise I wouldn't write anything if I hadn't stumbled across their great stories.

    Language:
    English
    Words:
    22,336
    Chapters:
    15/?
    Comments:
    134
    Kudos:
    237
    Bookmarks:
    44
    Hits:
    3410
  11. Tags
    Summary

    During a time that bitties have been bred with even human killing abilities in illegal kennels for bitty fights. Bitties are still not considered people or even regular monsters...just things or pets in the eyes of the law. One night you managed to save the life of a helpless edgy bitty from a blackberry bitty named Pitch and his gang. By saving the poor Edgy and finding out just how many problems he had to cause him to be in such a situation to begin with led you to the life you have now. You've become a licensed bitty therapist in hopes of reaching out to the abused, the neglected, and street worn bitties and giving them a chance at a better life. With your supportive and loving edgy bitty by your side years later down the road you should have know that eventually the past would come back to claim you after all your life no longer belongs to you.

    Series
    Language:
    English
    Words:
    25,762
    Chapters:
    5/?
    Comments:
    63
    Kudos:
    290
    Bookmarks:
    50
    Hits:
    3127
  12. Tags
    Summary

    Monster kind are now above-ground, you work hard, you don't think it's fair that a group of monsters are stuck in the same messed up world you were born in. But apparently fate is a cruel mistress because now monsters have to deal with the corruption of the surface.

    You are on the monsters side; but not everyone in your life agrees with your thinking.

    Language:
    English
    Words:
    37,091
    Chapters:
    22/22
    Comments:
    126
    Kudos:
    220
    Bookmarks:
    32
    Hits:
    3405
  13. Tags
    Summary

    The world has been changed irrevocably, monsters are real and here to stay, magic is a part of life, but for you...it's the end.
    You can't stand the pain of living with your crime, the pain of dealing with being a member of such a despicable species. So you try to end it all.

    Luckily Gaster has a solution.

    A reverse harem fic.

    Language:
    English
    Words:
    49,304
    Chapters:
    21/?
    Comments:
    348
    Kudos:
    444
    Bookmarks:
    78
    Hits:
    5091
  14. Tags
    Summary

    Every other weekend, you volunteer at a soup kitchen that operates out of a homeless shelter. As part of the government-funded rehabilitation program, a pair of monsters is sent to your kitchen to aid in their therapy. The brothers, Papyrus and Sans, are now partially your responsibility. Only…the way Sans stares at you with that wild grin is kind of spooky.

    And why does he keep calling you Peaches?

    Language:
    English
    Words:
    20,800
    Chapters:
    9/?
    Comments:
    320
    Kudos:
    571
    Bookmarks:
    117
    Hits:
    5009
  15. Tags
    Summary

    You needed a summer job and a place to stay for a while you weren't very good with having lots of money but lucky one of your closest friends who was wealthy and better yet wanted you and your other friend to help her out with a job in her Mansion that was now full of skeletons? Your two friends knew a lot about monsters now you didn't mind them coming to the Surface but you were quiet scared of skeletons... oh boy this will be fun will you face your fears and not let your friends down?
    Editor: @NinaBeena

    (ft UnderTale, UnderFell , UnderSwap, G Sans and Papyrus, SwapFell, ReaperTale, HorrorTale and Mafia/MobTale )
    might add more AUs in future chapters XD see how the story goes

    Language:
    English
    Words:
    87,393
    Chapters:
    40/?
    Comments:
    34
    Kudos:
    171
    Bookmarks:
    26
    Hits:
    2649
  16. Tags
    Summary

    Red gets you as a roommate for his wallet's convenience and ends up liking you a bit too much. One day, you're late coming home from work, so he decides to search your room for clues as to why. What he finds catapults you both into an awkward, tsundere dance around emotions.

    Language:
    English
    Words:
    163,668
    Chapters:
    64/?
    Comments:
    1909
    Kudos:
    1420
    Bookmarks:
    219
    Hits:
    28438
  17. Tags
    Summary

    Never have you ever... well, there's a lot you haven't done; skydiving, scuba diving. screwed a skeleton...

    Screwed in general...

    Well, your friends are here to help!

    Language:
    English
    Words:
    6,105
    Chapters:
    4/?
    Comments:
    73
    Kudos:
    193
    Bookmarks:
    37
    Hits:
    1693
  18. Tags
    Summary

    What happens when a flashy young skeleton meets a girl who just doesn't care about anyone or anything and is terrible at friendships?

    Language:
    English
    Words:
    831
    Chapters:
    1/45
    Kudos:
    6
    Bookmarks:
    1
    Hits:
    69
  19. Tags
    Summary

    You fell down in a hole on the famed Mt. Ebbot, a mountain where lots of people went missing. Today, that place would become your tomb as you come face to face with death himself, Sans. You know you're going to die, you can feel it but will he at least give you the peace of mind of a last request, a dying wish? Maybe.

    Language:
    English
    Words:
    6,392
    Chapters:
    2/3
    Comments:
    10
    Kudos:
    27
    Bookmarks:
    3
    Hits:
    506
  20. Tags
    Summary

    Amaya has had a thing for Sans for years, but after meeting with big-time human Don, Sans finally realizes that his long-time friend likes him. While WingDings has his eyes on a small time singer, he realizes that he wants her to give him a chance despite his reputation.

    Language:
    English
    Words:
    27,002
    Chapters:
    21/?
    Comments:
    15
    Kudos:
    20
    Bookmarks:
    4
    Hits:
    445

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