41 - 60 of 174 Works in Ecto-Tentacles (Undertale)
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Take You To Heaven, Take You To Hell. by SketchieFoxie
Fandoms: Undertale (Video Game), UTMV
06 Aug 2023
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Multiversal variants are sneaking into the multiverse and are causing huge issues! Cross after taking a bet from Killer decides to single handedly hunt down two troublesome variants.
Little did he know, that the variants were going to be succubi Dream and Nightmare, who are clearly interested in him…
And succubi don’t play gentle…
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- Part 8 of Undertale UTMV One-Shots
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I had never thought I'd go into heat, hell didn't even know heats existent outside the animal kingdom. But now I was in one, and it was up to my Mates to take care of me. Eight days of heat... would I be able to handle that? Well, we'll see, but until then I'm just going to enjoy myself as much as I'm able to.
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Chaos: Self indulgent fluff and sin! I like me a good reverse harem fic, and what better than a reverse harem fic where one skele gets the other nine?
Zion: This entire thing is just my gift to Chaos who wanted a skele only harem fic. If anything is questionable well, blame her xD the whole thing is just to indulge my partner.
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Nightmare learns Error has haphephobia and takes advantage of it to earn power above the God.
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"Good boy." Sol praised him as he ran his fingers along Dream's teeth and fangs. "You should forget about those mortals," The angel crooned. "You should just stay with us," he murmured sweetly, his inflection warm and seductive. The image of enticement. The Guardian's hot tongue traced the tips of his distal phalanges before obediently lapping and curling around the digits. The divots between them were soaked with drool.
Dream receives a little positive reinforcement from his alternates.
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- Part 1 of apple poly hell
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Dust lets out a thoughtful hum, then nods once. They aren’t… seriously considering this, are they? The mere suggestion has you squirming in Killer’s lap, your stomach full of butterflies.
“whadabout you, starlight? wanna have some fun with me an’ killer?”
…Do you?
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- Part 1 of PROPAGANDA
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A group of oneshots and story excerpts about Sans having a bad time, all revolving around pregnancy/childbirth in some way. It gets very graphic and there is death in several of the stories. No one is okay.
There is occasional fluff though, so don't get too sad.
DO NOT READ IF YOU WILL BE TRIGGERED BY ANY OF THE SENSITIVE CONTENT WITHIN. PLEASE READ THE TAGS -
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Error and Nightmare both have a fascination with the same human... you.
You're aware that your world is nothing more than code, and it irks you, deep inside.
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warmth lead me to you by gendermilk (orphan_account) for CupcakeAngel
Fandoms: Undertale (Video Game)
10 Apr 2023
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Nightmare has been struck with his heat suddenly, and he needs someone to help him with it. That someone will be you.
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Request from CupcakeAngel:
Here’s a Nightmare Sans x Pregnant 32 year old female human reader.It’s about Nightmare is in heat. And he went to a random AU and eyes on a human female that he picked on. First he watches her but then he soon realized she’s pregnant which he’s surprised but he didn’t care.. then when the time is right he went to oh you know what.. on her and all. [SMUT]
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Nightmare is more than just a bad guy. He and his poly protect others, too. Maybe they can help Blue out of a bad situation.
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- Part 9 of Underswap #832
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Two of a Kind, Can Make You Lose Your Mind♥ by WhittneytheScorpionSuccubus for MeGaLoTrash, redtomatofan
Fandoms: Undertale (Video Game)
18 Feb 2023
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Care for a Fontcest AU with all of the horny and none of the guilt?♥✨
Well, join in on the adventures of my lovable dorks, who're trying to navigate life, love, and living, while also trying their hardest not to fuck eachother's brains in♥✨
Watch as the respective universe "Sans" trying not to lose their shit around their adorable younger sibling(s) in my deliciously crafted Twins!AU♥✨
[[[Severe Canon Divergence: It's fontcest, bit it's also not fontcest, as it heavily follows the "Step-Bro/Onii-chan" Hentai trope, but without the excessive useless tropes that come with it♥✨]]]
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Two of a Kind, Can Make You Lose Your Mind♥ [BETA VERSION] by WhittneytheScorpionSuccubus for MeGaLoTrash, redtomatofan
Fandoms: Undertale (Video Game)
05 Feb 2023
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Some good old Twins!AU "Fontcest"♥ As each of their respective universe "Sans" trying not to lose their shit around their adorable younger sibling(s)♥✨
O~h the humanity!♥✨
[[[Severe Canon Divergence: It's fontcest, bit it's also not fontcest, y'know? You'll find out as you read the story...]]]
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*don't read this it's old and very bad* A forgotten soul (sans/papyrus x reader) *old* by tesadia
Fandoms: Undertale (Video Game)
03 Feb 2023
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Finally, you had fallen into a rhythm, life was starting to be normal.
But then Bam! A bunch of skeletons kidnap you and won’t let you leave. You just want to be free and experience the world, you want to know love and friendship, find new and exciting places to make memories.Maybe you can make those memories with this odd bunch of skeletons.
Maybe you can let go of your past and embrace the future. Hand in hand with a pile of Bones -
\.:~Never Going To Forget~:./ A Sketchmare Fanfiction by Daycore_Frisk
Fandoms: Undertale (Video Game)
27 Jan 2023
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2025 Update: UUUUGHH IM OLD NOW HELP. This is not my best work guys, not gonna take it down cause I know some ppl may like it + sake of memories but ough this was definately written by younger me
When Ink Frisk, our poor sleep-deprived, traumatized protector, is trying to forget the past and remove her nightmares, the bad guys, mainly Nightmare Sans, ruin that chance over and over, but why is Frisk refusing to fight Nightmare?? And is Nightmare acting a bit... strange? This Enemies-to-Lovers, sprinkled with a bit of angst and a LOT of tension, will leave you waiting for the next chapter.
#Quick Note: This will probably only ever be posted on our beloved Ao3, so if you see this, u are lucky.
#Quick Note 2: This is kinda old- but I think I'll edit it every now and then, and maybe make new chapters? -
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An among us inspired undertale sanscest story filled with romance, death, betrayal and angst. And smut.
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Each chapter will have a list of kinks as well as the pairing for that chapter. Tags for the collection will change as new chapters are added. Enjoy!
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Life is funny like that, you sure didn't expect to pick up an injured skeleton off a back alley(both metaphorically and physically) only to be sent into a completely different universe with said skeleton and his brothers who seem to just hate you with a burning passion! What follows that? Well more skeletons of course! At first glance they seem like a perfect odd family but is a normal family usually filled with emotionally unstable, depressed, ptsd infested monsters who seriously need therapy and a brat energy check? NOPE ! and just when did you turn into a therapist?!
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Incubus' Kinktober 2022 by MidnightChimera for dustsanses, LunTurney
Fandoms: Undertale (Video Game)
23 Oct 2022
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"Be careful what you wish for" is a powerful warning. One that the twins Nightmare and Dream don't seem to understand when both want there own idea of a family.
When Dream corrupted at the actions of his vile brother Nightmare. A powerful rift in the multiverse opened and sucked the twins as well as Nightmare's goons into portal into the unknown.The twins would soon get what they asked for, but like a genie that likes to screw you over with what you want.
Its not in a way any of then would expect. And it would go on to alter and change there lives permanently, whether they like it or not.
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After securing a work placement at the CORE, you begin to fall ill to some mysterious disease. Unfortunately for you, your boss is W.D Gaster, and he has taken interest.