1 - 20 of 3,015 Bookmarked Items in Ecto-Genitalia (Undertale)
Navigation
List of Bookmarks
-
Tags
Summary
Ink's bored. More than usual...maybe he can have some fun with error.
-
Tags
Summary
Killer is back behind him in a second, holding a bottle of cooking oil in his hand. Dust quirks a browbone as he looks over his shoulder.
"You know you can just go get the real lube from one of our rooms, right? Or you can call H to bring it, if you're that lazy."
-
Bookmark Tags:
Bookmark Collections:
-
-
Tags
Summary
a self indulgent small multi chapter smut fic of error, blue, and nightmare
-
Tags
Summary
Dust and reader hate eachother, they get abandoned during a mission and have to find a way to stay warm. they find an empty cabin and crash there for the night... but there was only one bed.
-
Bookmark Notes:
😍
-
Kinktober 2020-Disaster edition by RubyDracoGirl
Fandoms: Undertale (Video Game), Deltarune (Video Game)
31 Jan 2021
Tags
Summary
Time to get those bones. >;D
Seriously though, I can't believe I made it through this year to do this again! Now that I'm a little more organized, I can tell you that this is going to be a collection of hot garbage smut involving only Reader-insertXCannon pairings.
If that's your cup of tea, jump on in. A quick warning, as I forgot to mention, there's gonna be some dark smut fics this year. I'll mark them out at the beginning, so please, pay attention to the tags and the author's notes. Thanks ^^
- Language:
- English
- Words:
- 118,082
- Chapters:
- 31/31
- Comments:
- 482
- Kudos:
- 2,109
- Bookmarks:
- 253
- Hits:
- 103,257
-
leave it too long i'll go rot (like an apple you forgot) by necropathy
Fandoms: Undertale (Video Game)
25 Apr 2025
Tags
Summary
His eyelights were glassy, unfocused pinpricks of light floating within cavernous sockets. Fever radiated from him in waves, his bones glinting with the faint sheen of rising heat. Each shallow breath shuddered through his frame, erratic and unsteady, as though even the act of existing had become a battle.
The signs were unmistakable. Fevered. Overcome to the point of delirium. Every shiver, every labored breath, spoke of a body caught in the throes of a Heat so consuming that control had become a distant, unreachable goal.
For most monsters, this would have been ordinary—expected, even. An inconvenience of biology that, while inconvenient, was hardly unusual.
But this was Cross.
And therein lay the anomaly that hung in the air, thick and accusatory, like a question that demanded an answer.
"How curious," Nightmare murmured, his voice slipping into the room like a serpent through grass, low and smooth, almost inviting. His gaze never wavered, sharp and calculating as it swept over the trembling figure before him. "And here I thought you didn’t suffer Heats."
- Language:
- English
- Words:
- 5,279
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 29
- Kudos:
- 259
- Bookmarks:
- 45
- Hits:
- 1,981
-
Tags
Summary
You are the lead singer of Mili, an up and coming band you formed with your long time friends. You’re finally at your next chance at a record deal when you’re once again turned down. Desperate for help, your manager cashes in for a favor and enlists Mettaton’s aid. With a single signature you’re thrust into the world of monsters.
Now you’re being taught to dance by a prima donna robot with an unexpected and freshly internet famous dance partner: The tall, handsome, and destructively talented Desperado who starred in the internet’s newest viral video. While your life has altered significantly with your new role in Mettaton’s dance routine, Papyrus is a beacon of sunshine that keeps your spirits up. The two of you click instantly, and you become fast friends…
If only his older brother felt the same.
- Language:
- English
- Words:
- 378,683
- Chapters:
- 34/?
- Comments:
- 1,001
- Kudos:
- 1,096
- Bookmarks:
- 245
- Hits:
- 33,668
-
Bookmark Notes:
6
-
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 the shorter of the two. Will you let him in to help you with your haunting past? or will you run again when your past catches up to you
Updates on Sundays/Mondays!
A short break every 5 chapters :)
-
Bookmark Collections:
-
Tags
Summary
A night of drinking while trying to fix a broken heart may have been the best decision you ever made.
[On Hiatus]
Series
- Part 1 of Skeletons and Timelines
- Language:
- English
- Words:
- 151,634
- Chapters:
- 27/?
- Comments:
- 2,096
- Kudos:
- 2,489
- Bookmarks:
- 405
- Hits:
- 64,252
-
Tags
Summary
Where Dust went, Red followed.
Always.
-
Tags
Summary
After the hardship of war, monterkind has been sealed under the mountain. Grillby, however, has other things on his mind: the yearning ache in his Soul, the newfound, less than innocent desire for Gaster. A desire he’s not sure how to go about.
It turns out Gaster is more than happy to be Grillby’s first.
-
Bookmark Notes:
😎👍💅
-
Tags
Summary
«Drink up, ya fuck.» his voice and words are harsh, and Killer lets out a whimper, feeling Cross' hot piss all over his face, the skeleton not keeping his aim steady and making sure to cover Killer fully in waste magic.
Series
- Part 3 of kinktober
- Part 9 of are they really the bad guys if they're just hanging out?
-
Bookmark Notes:
好好
-
Tags
Summary
all my twitter threads in a book! easy to find!
warning for:
Deathcest
Incest (father/son)
(will add)-
Bookmark Notes:
The one Lotus fic
-
Tags
Summary
After running away from home and falling into the Underground, Reader finds herself the prisoner of two skeleton brothers, who intend to sell her soul to Asgore for a good cut. There has to be something that she can offer that could set her free. As usual for her - things can never seem to go as planned.
Series
- Part 2 of Sans Signature
- Language:
- English
- Words:
- 26,019
- Chapters:
- 17/17
- Comments:
- 385
- Kudos:
- 1,155
- Bookmarks:
- 137
- Hits:
- 27,102
-
Tags
Summary
When you were ten years old, your parents sent you to stay with a relative of yours from Ebott. Their villa was situated up on the mountainside, and you loved to explore the forestry. One day the ground gave out and you fell Underground, and faced terrors beyond your imagination. You were missing for weeks.
After you managed to miraculously return to the surface, your parents were relieved - but deeply troubled by your 'delusional ramblings'. They were convinced you were 'crazy', and feared how that would reflect on their reputation. Your doctors advised sending you to an in-patient psychiatric facility, which is where you spent the next few years in intensive therapy and counseling.
15 years later, you're a young adult with a somewhat manageable grip on life. You keep your head down, attend the social events that are expected of you, and try to be as unnoticeable as possible. Your parents arranged a suitor for you, and you're to be wed within the next year.
That is, until, those monsters your parents and doctors tried to convince you weren't real suddenly crawled out from the Underground. And they're a lot different from what you remember.
[[Underfell!verse.]]
- Language:
- English
- Words:
- 286,014
- Chapters:
- 35/?
- Comments:
- 928
- Kudos:
- 781
- Bookmarks:
- 153
- Hits:
- 26,814
-
Bookmark Notes:
Ch26
-
It's Just a Bad Dream by CrabbyMaiden
Fandoms: Undertale (Video Game), Dreamtale (Fandom)
24 Aug 2022
Tags
Summary
You loved him once, before he ripped you away from everything you had known and loved to let you wither away in an abandoned AU under the guise of keeping you safe.
Now you only thing you dreaded more than the crippling nightmares were his spontaneous visits.
[Written in 100-word drabbles!]
Series
- Part 5 of Requests
-
Bookmark Tags:
-
Tags
Summary
"Alex is this bad-ass motherfucker who totally does NOT have her shit together. She's snarky, kind of a bitch, and drinks a bit too much and ends up contemplating the thought of boning the small skeleton. Stuff goes down. You will laugh, cry and likely throw your fic-reading device of choice across the room. Enjoy!"
Smut Chapters are marked with * and the actual smut scene in the chapter is always skippable!Series
- Part 1 of Spitfire
- Language:
- English
- Words:
- 168,194
- Chapters:
- 77/77
- Comments:
- 2,254
- Kudos:
- 1,520
- Bookmarks:
- 220
- Hits:
- 40,010
-
Killer's mouth being put to good use...for once. by asheiskindafunny
Fandoms: Undertale (Video Game)
10 Mar 2025
Tags
Summary
Dust never thought he'd say this, but Killer is REALLY fucking good with his mouth....when he's not running it and annoying the shit out of him, that is.
-
Bookmark Tags:
Bookmark Collections:
-
Bookmark Tags:
-
Tags
Summary
The dichotomy between black and white is your constant when it's time for you to meet the whole new civilization Frisk brought along with them to the Surface.
As a parent, it's not easy to trust others when they've hurt your child.
So when that new civilization decides they owe Frisk both for saving their kind and for still hurting them during that process, you've got plenty to say to them.
Forgive as easily as you once did with others during a stage of naivety? Oh, hell no.
They better have a good reason for hurting your child and an even better one for wanting to be a part of their family.
• • •
Full Arc List:
Arc 1 | Ruins
Chapters 1 to 15 (✓ complete)
Arc 2 | Enemy Approaching
Chapters 16 to 25 (× current)
Arc 3 | Pathetic House
Chapters 26 to 30
Arc 4 | Spear of Justice
Chapters 31 to 40
Arc 5 | Here We Are
Chapters 41 to 50
Arc 5.5 | Good Night
Chapters 51 to 55
• • •
(Important Notice: If this work seems familiar, it was originally published in 2020, but was deleted due to various health issues!)
(OLD WRITING LASTS UNTIL CHAPTER 25.)
-
Bookmark Notes:
9
18
30
40
52
-
Birthday gift for DamnedXFate 2 by Chris_ghosty77 for damnedxfate
Fandoms: Undertale (Video Game)
22 Jun 2025
Tags
Summary
Dream finds a gift from his brother after starting a peace treaty. It's a dildo, and Dream just can't seem to get it out of his head for some reason. It quickly becomes all he can think about.
Warnings are dub/non-con, incest, dildo, voyeurism, obsession, overstimulation, virginity kink and loss of virginity, creampie.Series
- Part 10 of Undertail hypnosis series