1 - 20 of 1034 Works in Ecto-Penis (Undertale)

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  1. 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:
    166,858
    Chapters:
    65/?
    Comments:
    1937
    Kudos:
    1441
    Bookmarks:
    231
    Hits:
    28963
  2. Tags
    Summary

    It was a difficult task to find your soulmate, especially after monsters were free from the underground, double that once monsters from other dimensions started getting stuck here after coming through rifts. Sans had... a very strange connection with other versions of himself. Being the original, he stayed as far away as possible from everyone else, including people he knew and cared about.

    After years of trying to get his brother out of the house to try and socialize again, and at least meet with the new monsters from the rifts, and with no luck, Papyrus takes things into his own hands. Finally he gets his brother out with a little trickery, and hopeful that his brother would make a new friend.

    Nothing goes as planned.

     

    A rp between Fineapplequeen (Queenie) and ShadowHunter1215 (Auntie), Queenie as Sans, Auntie as Red.

    Updating every Thursday : )

    Language:
    English
    Words:
    65,341
    Chapters:
    12/?
    Comments:
    36
    Kudos:
    141
    Bookmarks:
    20
    Hits:
    1451
  3. Tags
    Summary

    Reader eats some monster food and BAM, she can see stats. A few months later, seeing stats outside of encounters has completely destroyed her life so she packs up and moves away. A chance encounter with a lanky skele sends her life in a new direction. Who knows if its a good one?

     

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

    Season 1: Fluffy Beginnings (Chapters 1-11)
    Season 2: Nightmare Arc (12-22)
    Season 3: ??? (23-??)

     

    Sinful Chapters: 2*

    Series
    Language:
    English
    Words:
    59,445
    Chapters:
    23/?
    Comments:
    252
    Kudos:
    367
    Bookmarks:
    72
    Hits:
    4700
  4. 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:
    54,138
    Chapters:
    21/?
    Comments:
    26
    Kudos:
    42
    Bookmarks:
    13
    Hits:
    687
  5. Tags
    Summary

    Horror and Dust have a love/hate rivalry.

    Killer is their judge and stress relief. He doesn't mind at all but they can get pretty rough in their hate fucking as they fight who can take Killer the hardest.

    Language:
    English
    Words:
    1,109
    Chapters:
    1/1
    Comments:
    3
    Kudos:
    25
    Bookmarks:
    3
    Hits:
    169
  6. Tags
    Summary

    Your year was going pretty great for you, despite some hiccups in the beginning. You graduated college, got accepted into dental hygiene school, bought a new car, adopted a kitten, and your relationship with your high school sweetheart was even better than before! Things were looking up for you, and you were STOKED for your future. Then it all came crashing down on you (quite literally) when you were in a car wreck. Luckily, you were in good hands, er, claws of a little lizard doctor. You two clicked pretty well, and that’s when things really took a turn.

    You met a certain goofy [handsome] skeleton.

    Language:
    English
    Words:
    11,877
    Chapters:
    6/?
    Comments:
    37
    Kudos:
    73
    Bookmarks:
    21
    Hits:
    910
  7. 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:
    56,784
    Chapters:
    13/?
    Comments:
    274
    Kudos:
    252
    Bookmarks:
    53
    Hits:
    4454
  8. Tags
    Summary

    Sans tries to go back in time to before his brother is killed. He ends up in the Underfell universe and bites off a lot more than he can chew. Can Underfell Papyrus help him back home or will he be stuck in this awful world forever?

    Notes:
    Noncon/dubcon warnings do not apply to any fontcest relationship.
    If you wish to skip the rape scene in this fic, you can skip chapter 3. However, the rest of the fic heavily references this chapter as this is a rape recovery longfic.
    Please read the warnings in the notes section of each chapter.

    Language:
    English
    Words:
    143,216
    Chapters:
    27/?
    Collections:
    2
    Comments:
    503
    Kudos:
    746
    Bookmarks:
    110
    Hits:
    13223
  9. Tags
    Summary

    Some rough sex with Edge gets to be a little too much, so he comforts you instead.

    Language:
    English
    Words:
    841
    Chapters:
    1/1
    Comments:
    1
    Kudos:
    19
    Bookmarks:
    2
    Hits:
    326
  10. 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:
    23,670
    Chapters:
    10/?
    Comments:
    375
    Kudos:
    649
    Bookmarks:
    128
    Hits:
    5755
  11. Tags
    Summary

    The Reader has finally made their way out of Fellswap's Ruins, only to fall into the bony grasp of a much more dangerous, lust-filled skeleton.

    Language:
    English
    Words:
    3,541
    Chapters:
    1/1
    Comments:
    5
    Kudos:
    26
    Bookmarks:
    3
    Hits:
    379
  12. Tags
    Summary

    Jaws hates Ash.

    Ash hates Jaws.

    They both need just one more human soul, to save their worlds.

    One is all it will take.

    Too bad she's damaged goods.

    Language:
    English
    Words:
    8,796
    Chapters:
    2/?
    Comments:
    8
    Kudos:
    17
    Bookmarks:
    2
    Hits:
    187
  13. 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:
    21,856
    Chapters:
    10/?
    Comments:
    57
    Kudos:
    116
    Bookmarks:
    24
    Hits:
    1045
  14. Tags
    Summary

    Stretch had always had strong feelings for his brother. He did very well keeping it hidden until one day, his crush suggested they 'Practice date' so that blue can gain more experience. How will Stretch get himself out of this one and keep his feelings hid?

    A/N; Been working on this side project whenever I have writers block. i wasn't going to post it at first but I thought "What the hell, why not?" lol.

    Language:
    English
    Words:
    8,341
    Chapters:
    5/?
    Comments:
    35
    Kudos:
    45
    Bookmarks:
    4
    Hits:
    505
  15. Tags
    Summary

    Growing up, Frisk had always found it horrible how humans had decided to enslave the Monster race. Selling and breeding them as though they were animals; going so far as to sell them in stores. Yet here they were; standing in front of the Shelter, or “Sanctuary” as they called it, intent on purchasing a Monster of their own. How had they let themselves get talked into this?

    Language:
    English
    Words:
    7,076
    Chapters:
    3/?
    Comments:
    27
    Kudos:
    73
    Bookmarks:
    8
    Hits:
    566
  16. Tags
    Summary

    Madness... crime... lust... and that was all *long* before the Fallen Virus wreaked havoc; now things are so much worse. You were able to miraculously survive, but a storm moved through last night and the cacophony of thunder has drawn a herd your way. This is it, this is the end, and so you ready yourself to make a final stand... wait... since when did fallen ride motorcycles?

    ~A mutated STI has swept across the country, killing and then reanimating its victims. Amidst all the violence and despair, two skeleton monsters have made themselves a haven while searching desperately for a cure. Cock your gun, stay quiet, and remember everyone... *don't get bit.*~

    Language:
    English
    Words:
    10,036
    Chapters:
    3/?
    Comments:
    71
    Kudos:
    119
    Bookmarks:
    29
    Hits:
    780
  17. Tags
    Summary

    Sans and Papyrus have been dating for some time. They have to keep their relationship a secret, for fears of being torn apart.

    Sans is afraid of moving onto the next step, but Papyrus is very helpful in convincing him.

    Basically Papyrus is really hot and Sans is too cute for his own good.

    30 day nsfw otp challenge

    Language:
    English
    Words:
    10,508
    Chapters:
    13/31
    Comments:
    2
    Kudos:
    86
    Bookmarks:
    13
    Hits:
    1785
  18. 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:
    278,509
    Chapters:
    48/?
    Comments:
    488
    Kudos:
    281
    Bookmarks:
    47
    Hits:
    5811
  19. 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:
    90,255
    Chapters:
    41/?
    Comments:
    36
    Kudos:
    176
    Bookmarks:
    25
    Hits:
    2817
  20. Tags
    Summary

    Grillby is a rather quiet, emotionless guy. Who is he? Where did he come from? What’s the type of monster he’s into?

    And most importantly…

    Why does Papyrus hate going to Grillby’s so much?

    Let’s find out. Shall we?

    Language:
    English
    Words:
    63,992
    Chapters:
    14/?
    Comments:
    841
    Kudos:
    1043
    Bookmarks:
    115
    Hits:
    25349

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