41 - 60 of 2,027 Bookmarked Items in Ecto-Penis (Undertale)
Navigation
List of Bookmarks
-
Tags
Summary
Ink has had no reason to learn about sex until today. From then on, it's become a bit of a thing between him and Error. But only Ink and Error would make sex into a competition.
-
Bookmark Notes:
Lots of lemon
-
Bookmark Tags:
-
-
Tags
Summary
A quick fluffy oneshot with Underswap Sans and you, the reader, in first person pov, about a massage given to a very touch-averse person. (Hint: that's you!)
First work ever, comments and feedback are very much appreciated!
(thanks VERY much to Ravenxxx97, who helped me edit/ proofread this- I love you <3)
-
Tags
Summary
Papyrus and his Detective partner (you) have to solve a missing persons case. It turns into a huge undercover operation where you still have to rescue the missing person: Sans!
Along the way there's shenanigans, swearing, sex, misunderstandings, bad puns, and you fall in love with your spiky partner's brother.-
Bookmark Notes:
21
-
-
tonight we are victorious ′cause we are no saints by CelestalStars for Ari_tan
Fandoms: Undertale (Video Game)
20 Mar 2025
Tags
Summary
Prince Cross is so endearing to Fae Dream that as the Fae prepare to slaughter the mortal Kingdom for King XGaster's insolence, he's stolen away on a whim. This has consequences.
Series
- Part 7 of Fae UTMV
- Part 15 of UTMV Oneshots
-
Bookmark Tags:
Bookmark Notes:
tonight we are victorious ′cause we are no saints by CelestalStars
Summary:
Prince Cross is so endearing to Fae Dream that as the Fae prepare to slaughter the mortal Kingdom for King XGaster's insolence, he's stolen away on a whim. This has consequences.
-
Tags
Summary
Cross returns from another successful mission ready for some alone time when his Boss finds him and decides it's high time his loyal soldier is given his reward.
-
Bookmark Tags:
Bookmark Notes:
Summary:
Cross returns from another successful mission ready for some alone time when his Boss finds him and decides it's high time his loyal soldier is given his reward.
-
Tags
Summary
Several weeks have passed since you fell into these labyrinthine subterranean caverns. It's time for you to move forward.
[Explicit Sans x Reader, the reader insert's sex is undefined and can be interpreted as either male or female.]
-
Tags
Summary
Papyrus wants to take your relationship to the next level, and he has a crafty plan to make that happen.
Written for the 'Let Papyrus Fuck' 2022 event.
-
Bookmark Collections:
-
Tags
Summary
You spend some time with Killer and Nightmare.
Even though both of them are very keen to help you have a good time, can they actually work together, or will those little sparks of jealousy between them get in the way?Should you be a brat and do a little instigating? Absolutely. Just a little. As a treat.
-
Tags
Summary
Ink was infuriating. However —to his bad luck— It wasn't a wonder how Nightmare let him do whatever he wanted. Was it really weakness if the thing disarming him was love? When would Nightmare draw the line, if he ever tried?
or
Was it really a bribe if that wasn't the initial intention / he genuinely just wanted to have a taste of the good old arbor vitae?
Series
- Part 2 of There are other means of deceit
-
Tags
Summary
While hiding their relationship had its charms (adrenaline was one hell of a thing), it wasn't very often they could enjoy some time alone. They'll definitely make the most of it.
or
Ink and Nightmare kiss 40 times, keep talking for some reason and end up doing it out of wedlock (good)
Series
- Part 1 of There are other means of deceit
-
Tags
Summary
Nightmare has always been distant from his gang for multiple reasons. But deep down, he does love them. How does he show his affection towards them while having plausible deniability? Sex.
-
Country!Fresh Sans x Reader smut by NonstopCreatorOfNonsense
Fandoms: Undertale (Video Game)
03 Sep 2020
Tags
Series
- Part 4 of X Reader (Smut)
-
Tags
Summary
This was supposed to be a normal movie night...
How the fuck did it turn out this way?Yk ur classical corny movie 🌽 shit trope
Why did I let Kwaz talk me into this again...?
I did not have any ideas for the title do not judge ms
-
Tags
Summary
You’ve just moved in with your girlfriend into her mansion filled with skeletons.
Thinking you were just going to stay out of their way, it turns out most of them have a crush on your girlfriend!
Well guess it’s time for you to show them who’s boss.
-
Bookmark Notes:
14
-
Bookmark Collections:
-
-
Brick by Brick by TallDumbass for UnicodePhantom, popatochisp
Fandoms: Undertale (Video Game)
17 May 2022
Tags
Summary
Collection of various soft and spicy moments between you and Horrorfell Sans
-
Tags
Summary
My first time writing smut and it’s for a Kinktober LMFAO
Sans (Aus) x Reader smuts only :)
MOSTLY dom reader <33
ill update the tags as i go!!-
Bookmark Notes:
8
-
Tags
Summary
You honestly can't remember when you had officially moved into the lodge to be with your datemate. It started as leaving things in his room under the (flimsy) excuse of having stuff for the next time you have an impromptu sleepover—but it was a not-so-subtle takeover.
The others didn't mind it either and were gracious enough to provide you with your own room for when everyone's shenanigans prove to be too much for you, but little did they know that they practically invited the devil herself into their home, because you're the queen of starting some bullshit or doing things for the bit.
-
Bookmark Notes:
2- I like the nicknames for the guys.
-
Bookmark Notes:
My lovely friend Liliths work <3
-
-
Tags
Summary
You and Sans have spent the last five years toiling in the lab on your magnum opus: a looking glass into alternate timelines. But when you test it one late night in the lab, the impossible happens and you are taken into a world much more violent and crueler than your own. Needing to survive until you're rescued, you will have to use all your wits, charm, and determination to convince three paranoid skeletons you aren't insane or a spy. Good luck, doll.
- Language:
- English
- Words:
- 105,124
- Chapters:
- 20/?
- Comments:
- 363
- Kudos:
- 789
- Bookmarks:
- 192
- Hits:
- 21,134
-
Bookmark Notes:
Despite the spelling errors, it's a really brilliant fic. I really like everyone's characterizations and how real everyone feels.
It's good to see that thing's have cleared up in chapter 20- and that the house arrest is finally over... Really wondering what would happen next- especially now that Sans knows it wasn't all a lie.
Hoping for updates. Ch. 20
-
Tags
Summary
It was a nightmare for you before you finally left the mansion. Heather had them all wrapped around her finger and made your life hell. At least you finally got away.
Then three years later you see on the news- the mansion was used for monster trafficking. The darker parts of society in other countries were always looking to get their hands on a monster to study.
With the autonomy Sans was afforded by monster society, royal guards and police never suspected the mansion was where monsters were being kept imprisoned after being kidnapped. A bloody and violent escape attempt finally exposed the secret. Now all the monsters imprisoned are free, including the skeletons who were chained for two years.
You want nothing to do with it, but there was one skeleton you did care for- Mutt. His brother was dead and who knew what traumas he faced in the mansion. He helped you get on your feet when you left. He was there when you needed him and it was time to return the favor, regardless of who else you might meet...- Language:
- English
- Words:
- 45,552
- Chapters:
- 16/?
- Comments:
- 531
- Kudos:
- 1,469
- Bookmarks:
- 334
- Hits:
- 31,061
-
Tags
Summary
It was Tav's birthday, and she was back in the Elfsong. But this time she was naked, tied to a bed with her legs spread, blindfolded, and she was almost trembling with excitement and arousal.
Birthday gangbang, female Tav with no description. She's had all the companions separately... now she wants them all at once. Entirely, unapologetically smut.
Series
- Part 2 of Tav Gets Around
