1 - 20 of 1177 Works in Ecto-Penis (Undertale)

Pages Navigation

Listing Works

  1. 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).

    Update: this has turned into a bit of a story. Still a lot of smut but now there is aftermath and hurt/comfort thrown in.

    Thanks to HailSam for helping me find a bit of a direction for this thing to go in, there will be a few more chapters.

    Language:
    English
    Words:
    9,474
    Chapters:
    3/?
    Comments:
    7
    Kudos:
    37
    Bookmarks:
    5
    Hits:
    461
  2. Tags
    Summary

    Monsters have made it to the surface and made a place for themselves. A place that's still dangerous for humans.
    Feeling ill and heading to her apartment at the edge of the Monsters' part of town, (Y/n) runs into a wall, helped there by Sans, who she'd run into first. When she wakes up, she's a human in the middle of the Monster territory, with no way out and a couple of edgy skeletons for hosts.
    Sans doesn't particularly want to hurt just anyone, but he has to keep his tough guy image up. What he wants, is to find out why this strange, beautiful human woman kissed him, especially after he'd thrown her against a brick wall, but she faints too quickly to ask. To keep her safe, he decides to take her home until she wakes up. ...and then maybe he decides she should stay there a little longer...

    Language:
    English
    Words:
    37,974
    Chapters:
    15/?
    Comments:
    115
    Kudos:
    266
    Bookmarks:
    52
    Hits:
    3861
  3. Tags
    Summary

    Coyote has always been good at escaping knots. You've made it very clear that he'll only be getting rewarded if he learns to heel.

    Tumblr smut request.

    Series
    Language:
    English
    Words:
    1,452
    Chapters:
    1/1
    Comments:
    4
    Kudos:
    16
    Hits:
    149
  4. 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
  5. 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:
    2129
    Bookmarks:
    376
    Hits:
    38160
  6. Tags
    Summary

    an·thro·poph·a·gus

    noun:
    a cannibal, especially in legends or fables.

    ___

    Sans was broken, and all he wanted to do was keep his brother alive. You were supposed to be food, something to keep his family fed for a few weeks.

    But now he’s just determined to keep you alive in this living nightmare, as well.

    ___

    Updates every Saturday/Sunday

    Language:
    English
    Words:
    47,998
    Chapters:
    18/?
    Comments:
    602
    Kudos:
    908
    Bookmarks:
    184
    Hits:
    14145
  7. Tags
    Summary

    (Y/n) lost her job, which sucks. If only she hadn't lost her second job, and apartment, as well! Now all she's got is a camper full of her crap on the back of her truck, and nowhere to go. At least she found this campground, even if it is in the middle of nowhere, and looks like no one has been around it for a while, and a skeleton with a head wound tries to make her into a meal... Rough start to making new friends, but his brother is sweet enough!
    And then there's the other skeletons who inhabit the other cabins, who all look vaguely similar... Their explanation of "cousins" only goes so far, but there are more concerning things to worry about, like how almost every skeleton is trying to get into her pants, their heats, and where her clothes, particularly her socks, keep disappearing to?!

    Language:
    English
    Words:
    14,797
    Chapters:
    7/?
    Comments:
    93
    Kudos:
    247
    Bookmarks:
    70
    Hits:
    2433
  8. 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:
    75
    Bookmarks:
    9
    Hits:
    387
  9. Tags
    Summary

    You make a mistake and Sans decides to completely obliterate you for it

    Language:
    English
    Words:
    2,040
    Chapters:
    1/1
    Comments:
    18
    Kudos:
    43
    Bookmarks:
    6
    Hits:
    725
  10. Tags
    Summary

    You ran away. You couldn't face your dark past, it was to much for you. You moved to Ebott City to start a new life. Swearing off friends and relationships all together. Or so you thought...Two skeleton brothers move in next to you. You can't help but be drawn into them. Will you let them in to help you with your haunting past? or will you run again when your past catches up to you?

    Language:
    English
    Words:
    76,383
    Chapters:
    42/?
    Comments:
    330
    Kudos:
    634
    Bookmarks:
    99
    Hits:
    10081
  11. Tags
    Summary

    You had dealt with many things in your life. Fae, Supes, the Paranormal. Should be normal and easy for you, right? Wrong. When tragedy struck the Monster part of the city, there wasn't much else that could be done other than relocation. Guess who got the honor of being a host to some skeleton monsters? It wasn't Karen down the road, that's for sure. What do you get when you try to mix a human trying to keep secrets, and a bunch of suspicious skeleton monsters with mixed feelings? Trouble.

    Language:
    English
    Words:
    7,950
    Chapters:
    6/?
    Comments:
    28
    Kudos:
    263
    Bookmarks:
    68
    Hits:
    2596
  12. Tags
    Summary

    You and sans wanted to try something new in the bedroom, with an enchantment that allows you to not breathe and sans's magic this will be a night not to forget.

    Language:
    English
    Words:
    1,084
    Chapters:
    1/1
    Kudos:
    7
    Hits:
    199
  13. 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:
    1373
  14. 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
  15. Tags
    Summary

    Ink would do anything for his best friend. So when he finds out that her husband has been abusing her for years now, he isn't happy. Especially considering she just entered her third trimester.

    Ink would do anything for his best friend.

    Because he loved her.

    Language:
    English
    Words:
    1,339
    Chapters:
    1/2
    Comments:
    15
    Kudos:
    41
    Bookmarks:
    8
    Hits:
    258
  16. Tags
    Summary

    Domestic morning One shot inspired by the Story Bitty House by BlamefulSea

    Honey Bee is a lil bro bitty, 15 inches tall adopted to ease the loneliness of a young adult woman. They share a peaceful morning.

    EDIT: I keep adding more chapters! I cant stop! someone save me!!!!! XD

    Language:
    English
    Words:
    23,699
    Chapters:
    10/?
    Comments:
    18
    Kudos:
    63
    Bookmarks:
    10
    Hits:
    918
  17. Tags
    Summary

    People have always considered you an angel for all the good you do for others. Oh if only they knew just how true that statement was.

    You are literally a Guardian Angel assigned to protect the Ambassador of monsters, Frisk. It has been almost 4 years since monsters came from the Underground and 4 years since you have become friends with the rag-tag group we all know and love. You've watched Frisk grow and do great things for monsters but of course... Nothing is perfect.
    (It's totally Sans' fault)

    Language:
    English
    Words:
    5,837
    Chapters:
    5/?
    Comments:
    17
    Kudos:
    164
    Bookmarks:
    35
    Hits:
    1189
  18. 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
  19. 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:
    1285
  20. 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:
    176,583
    Chapters:
    67/?
    Comments:
    2086
    Kudos:
    1612
    Bookmarks:
    266
    Hits:
    33807

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

Pages Navigation