1 - 20 of 875 Works in Ecto-Vagina (Undertale)
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Red Bones (Uf!Sans) won a scholarship at the St. Wendell Ebott University, a secluded University in Maine, and goes abroad to study at the Tōkyō Rika Daigaku (Tokyo University of Science) to become a Bachelor of Science. With his late father’s last savings, he flies to Tokyo and takes residence there.
Sans Serif (Ut!Sans) is offered a position as a teacher at the prestigious Tokyo University of Science. Having won a Nobel Prize in Physics 20XX for his findings in quantum physics, studies of multiple alternate universes and The Void. He is ready to impart his wisdom to the masses as a part time professor.
What happens when these two collide?
Drama unfolds!
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Este es un reto de 10 día para escribir de mi AU horrorverse, espero que les guste!
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The king has fallen.
In the devastation left in the human's wake, a new king is needed. Papyrus steps up to the challenge, assisted by his brother.
Sans is sworn to obey the crown, bound by the Delta Rune. Regardless of who wears it.
But when dark alternates show up and threaten war, Papyrus has to make the hardest decision of his life, and Sans finds out the chains that bind him might not be as secure as he'd like.
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What Happens in Space Vegas (Never) Stays in Space Vegas by Acoustic_Meatus
Fandoms: Undertale (Video Game)
28 Sep 2025
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Sans and Red's semi-annual weekend bender in Space Vegas takes an unexpected turn.
Or, the boys wake up in the aftermath of a hasty Space Vegas Wedding and consistently fail to make any wise decisions.
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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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Cedric lives alone in an old apartment building. He has always been sensitive to the presence of ghosts, and there are several inhabiting his complex. He has befriended the ghost of a woman named Maggie who used to live in his apartment years ago. She was really shy at first but started to warm up to him slowly. Nowadays, they write notes to each other and talk pretty regularly when she decides to make her presence known.
Tonight, Maggie wants to take the friendship with her living companion further. She surprises Cedric with late night visit, and the two of them cross dimensions to make paranormal love right there in his lonely bed.
Cedric can't see Maggie, but he can definitely feel her well-shaped and eerily cold yet titillatingly electrified body. He can also see and feel the thick lubricating ectoplasm that leaks out of her and all over him.
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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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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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Oh how stupid was he? To be in this such position with his nemesis, technically one of his nemesis but that isn't important. Fate is watching? Well hope she enjoys the show then.
Or, Error fucks Fatal
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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
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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?
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- 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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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?
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Papyrus loves Sans, perhaps more than a brother should
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stage 3 is bored. boredom never leads to anything good. and hey, it's not like he feels anything, but in the midst of a fight with horror, wouldn't it be fun to at least pretend to feel that one feeling (what was it, horniness?) and see what happens if he 'were'?
what did the horrortale storyline go like again...? surely talking like undyne would lead to something new!- Language:
- English
- Words:
- 2,588
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 104
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Lust is the most prized escort in town, with a Boss no one has ever seen and who's the subject of many rumors. Red and Sans are both heirs to the two most powerful mafia families in town. What happens when they're accidentally booked with Lust together ? And are they truly the ones in control ?
(Content warnings in the tags)
Series
- Part 13 of Undertail hypnosis series
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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.
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Edge is a child. Well, a teenager, but a child nonetheless. Children needed love. Edge never received it. Edge looked for it in the worst way possible.
Coffee is an adult. Well, a young one, but an adult nonetheless. Adults needed love. Coffee never received that. Coffee was happy to provide Edge with plenty.
TLDR: Edge gets groomed by Coffee.
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Dream felt nervous.
He was usually the optimistic one, always seeing the bright side of things. But tonight, something felt off.
The house was silent. Nightmare had been working late hours recently, leaving Dream to eat dinner alone, but this wasn't loneliness creeping in. This was fear.
He didn’t like being separated from his twin. Not now. Not when everything was so wrong.
Not when he knew he was being watched.
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AKA Dream and Nightmare getting stalked by our two lovable boys, Killer and Cross <3 haven't written a fanfic in years so this might be ass. Also title is inspired by the song with the same name!!