1 - 20 of 1,882 Works in Ecto-Penis (Undertale)
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“And then what do you suggest I do to ‘relax’,” Nox said, putting emphasis on the last word. It was an odd word, one that he felt shouldn’t be in his vocabulary, or at the very least not allowed to ever use it in any context.
Killer shrugged, turning around to hoist himself up onto the banister. He sat down on the ledge, his legs kicking next to Nox as he looked down upon the other, still grinning. “Whatever you want. We’ve got movies, games and… other extracurricular activities.”
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Lust, a captivating massage therapist, finds solace in two unlikely relationships with Red, a fiercely protective teacher, and Dance, an exuberant skeleton with a traumatic history. As they celebrate the anniversary of their unconventional love, a dark twist shatters their fragile happiness.
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Error succumbs to his forbidden desire, secretly taking Cross in his sleep.
Series
- Part 23 of [Kinktober 2024]
- Part 6 of comms/requests
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i was meant to be yours (you were meant to be mine) by necropathy
Fandoms: Undertale (Video Game)
20 Sep 2025
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The urge to hiss and spit clawed at his throat, but he forced it down. His survival depended on keeping Sol’s guard down. Any sign of defiance now would only tighten the noose. He had to play along, to behave, even as every instinct screamed at him to fight back.
He stiffened as Sol’s hand traced a soft, burning path down his spine, the touch almost tender through the fabric of his clothes. It took every ounce of willpower not to flinch away, especially when Sol guided him down to sit, his fingers deftly beginning to undress him.
The intimacy of the act made his bones crawl. But he swallowed his revulsion. Resistance would only make his escape harder.
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Cross finds Dust in the middle of an LV episode and does the only the thing he can think to do since they're alone in the castle.
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Working at a bar wasn’t all that bad. Sure, sketchy people would show up, and sure, there have been some fights, but besides that, it wasn’t that hard for her to focus on her job. Of course, the only person who made Muffet’s shift bearable was Fell, who had become a regular.
This is an image roleplay format & podfic loosely inspired by Sooner or Later You're Gonna be Mine by Staringback ( A03).
So if you are a Frans shipper, I'm sorry, but adult Frisk will not be in roleplay. Muffet will be taking her place as Sans' love interest... DunkinDonut.
Please enjoy.
- Language:
- English
- Words:
- 10
- Chapters:
- 2/?
- Hits:
- 58
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Starvation and desperation has run rampant in Underswap/Horrorswap Sans' AU for weeks. And with his friend and royal scientist, Undyne having nearly succumbed to malnutrition. It's up to Sans, the new interim royal scientist to solve the crisis before the returning king Asgore is ousted from power.
His weeks of research and isolation in the royal lab culminates in him believing he's developed a small yet extremity calorically dense food source in blueberries; grown in Determination (DT) and Perseverance (PV) enriched soil. With time running short and his own hunger beginning to set it. Sans makes himself the monster test dummy.
Good news; it looks to work
Bad news...just a few very juicy, very inflammatory, very mind altering, and VERY permanent side effects.Welcome to Berrytale
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A truce was quite a solid thing, between lovers. Not that anyone from their teams needed to know about just how close Ink and Nightmare have become with the years: they would remain blissfully ignorant, if they could help it.
The anniversary of the Truce would change nothing. They only needed to stay apart from the night, after all. It was an easy enough task.
Right?
or
The extended cut of Scheme: chapter 7.
Series
- Part 5 of There are other means of deceit
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Using Frisks Soul, Asgore manages to bring down the Barrier, in the process absorbing the souls and becoming a being of unfathomable power. Using a monster army and his newfound strength, he takes over a town at the base of the mountain.
Monsters become the reigning power, and a human slave trade blossoms in "Overground" (so named by Asgore). Monsters own humans as butlers, pets, and entertainment.
Sans never thought he would personally own a human servant, but after a chance encounter, he has to face his worst fear - living with the same creature as the one that haunts his worst nightmares.
Series
- Part 3 of The Butterfly Effect 💚💛🧡💜💙🩵❤️
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How To Make A Fully Loaded Caramel Apple Pie With White and Dark Chocolate Drizzle<3 by WhittneytheScorpionSuccubus for Mochimunchies
Fandoms: Undertale (Video Game)
07 Sep 2025
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I'm sorry if I'm taking so long, I want to make sure this sweet baby is well cooked and fucking delicious!<3 >:3c
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random stories i feel like writing by Astral_johnson
Fandoms: Voltron: Legendary Defender, The Amazing Digital Circus (Web Series), Cookie Run (Video Game), Xiaolin Showdown (Cartoon), Naruto (Anime & Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), Harry Potter - J. K. Rowling, Pocket Monsters | Pokemon - All Media Types, Homestuck, Undertale (Video Game), Wild Kratts
06 Sep 2025
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this doesn't take place in anything just something i randomly made up
asher(i like this name) is the mc
asher was running from demons he's a incubus who finds a church -
Pleasure’s torture by Ray_64
Fandoms: Undertale (Video Game), Dreamtale - Fandom, Swapdream - Fandom, SwapDreamTale - Fandom
05 Sep 2025
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Made this for fun, might make more Swadmare or UTAU fanfics in the future ;3
- Language:
- English
- Words:
- 4,289
- Chapters:
- 1/1
- Kudos:
- 12
- Hits:
- 227
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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.]]
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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 (✓ complete)
Arc 3 | Pathetic House
Chapters 26 to 30 (× current)
• • •
(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.)
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Two travellers running from their own minds meet on a precarious cliffside. Do they find comfort in one another or is everything going to go to hell?
Series
- Part 2 of I Hate That I Love You
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Error lost one fight after another to the Star Sanses. The Universes and code problems kept piling up, and despair drove him to do anything. He tried everything—different strategies, plans, traps, code combinations—but nothing worked, and he remained stuck, with unfinished work and voices behind him.
Until one day, he was embarrassed to discover that suddenly, after so much magic had been spilled by him and his enemies during fights, he could... Invoke a certain, intimate part of the ectobody without their knowledge and influence it as he pleased. Of course, Error was not going to use this! No way! He had principles! Pride, after all!
But... Every day it became more and more difficult, and no other options appeared. And if he could overcome his embarrassment and shame, then maybe it would be worth it?..
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this is a collection of underswap papyrus x reader smut from my main book 'First the dead rise and now SKELETONS?
this can be read as a stand alone smut book as I'll try to keep any major spoilers out of it but some scenes may be confusing without context
I kept the gender and description of the reader ambiguous so it can be read by everyone of any genderSeries
- Part 2 of Into the apocalypse
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You've been living in Snowdin for a couple months now, taken in by a pair of friendly skeletons, a bubbly short one and a chill tall one. Things are going well up until Papyrus starts acting strangely. Why does he keep avoiding you? Why is he acting so possessive? And why won't he tell you what's wrong?
(A short, self-indulfent warm-up fic I'm doing to get back into writing. :)
will try my best to update somewhat regularly but we'll see. my or may not turn this into a series of one-shots.) -
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Red finally, finally gets Sans to agree to a fun time in bed. They have a great time together! Then Sans goes and works himself to the bone before finding the courage to invite Red to see a meteor shower. Who knew he'd learn Red's deepest secret while under the stars?
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When you find yourself somehow having traveled to the world of undertale how do you handle all the hot skeletons?