1 - 20 of 1,890 Works in Ecto-Penis (Undertale)
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"We are strangers, you and I,
What makes us different from who we once were and will never be?
We are no longer the same, it is a fact,
So why does the pain remain the same?"★ ★ ★
Error has spent his life trying to forget Ink, the one he once believed was his everything.
Now, nearing his 30s, he is ready to fulfill a promise that will finally allow him to leave the past behind. But fate has other plans, and an unexpected reunion could either rekindle the flame or destroy it all.
Nothing is as it seems, and a secret kept for years could rewrite their entire history.
Will the love that once bound them be enough to heal old wounds?
Or will they continue to pretend they are strangers?
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NSFW Epilogue of my main fic ''The Reluctant Crown''
It follows the plot after the main fic and then time skips a bit. Can be read by its own I suppose but I highly suggest reading the main fic first!
Series
- Part 2 of The Reluctant Chronicles
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Meet Grace a young bar owner with secret she holds tight but what happens when she meets a certain skeleton monster with a big 'family' Will her secrets stay hidden or will the world know.
(I am bad at tagging sorry.)
All the aus here are undertale, underfell, underswap, Swapfell purple, Swapfell red, Fellswap gold, Mafiatale, Mafiafell, Mafiaswap, the gaster brothers, horrortale lusttale, and lustfell. -
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"Somos desconocidos tú y yo,
¿qué nos hace diferentes de lo que alguna vez fuimos y nunca seremos?,
ya no somos los mismos, es un hecho,
¿entonces por qué el dolor sigue siendo el mismo?"★ ★ ★
Error ha pasado su vida tratando de olvidar a Ink, con quién alguna vez creyó tenerlo todo.
Ahora, casi a sus 30 años, está listo para cumplir una promesa con la que finalmente dejará atrás el pasado. Pero, el destino tiene otros planes y un reencuentro inesperado podría avivarlo o destruirlo todo.
No todo es lo que parece y un secreto guardado durante años podría reescribir su historia.
¿Podrá el amor que una vez los unió sanar las viejas heridas?
¿O seguirán pretendiendo ser desconocidos?
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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. -
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You and your family are just enjoying a nice day at the park, when a life changing event happens that ruins everything.
You get taken away to a facility to be tested on...
Life doesn't feel as peaceful as it once did, you hated your new life.
"I wish I could just go into those story books I used to read..."
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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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Killer lived his whole life by following 3 crucial rules, what happens when he accidentally breaks all of them?
How does he cope with a world that is slipping away from him as he struggles to keep himself from spiralling?
Can he help everyone or will he fall?
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Something is wrong with Nightmare
- Language:
- English
- Words:
- 1,238
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 117
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An arranged marriage still needs to be consummated in the traditional way, and the sooner the better, given what all is at stake.
At least your new husband Captain Sans seemed like he knew what he was doing. -
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Error must hunt down Ink before time runs out, or he'll soon find that consequences have a cruel way of catching up.
Series
- Part 1 of CRUOR AU
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Dust Bunny (Red/Dust with bsp on the side) by Chris_ghosty77 for ohitsthatguy
Fandoms: Undertale (Video Game)
12 Feb 2026
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Dust loses a bet against Red and is forced to wear a playboy bunny outfit, unaware the bunny ears may have more than just a humiliating effect.
Fic trade with my friend Ohitsthatguy !!! I hope you'll like it!!!
Series
- Part 16 of Undertail hypnosis series
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“I shall allow it.”
“...The cannibalism?”
“Your release upon my expression," Nightmare sighs.
Nightmare may be blind, but there are still some things that Juniper wants to see.
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The Grass is Covered in Blood / Horror x Farmer by Merrakii_00
Fandoms: Undertale (Video Game)
10 Feb 2026
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Maybe being thrown into another universe wasn’t so bad.
The work may be hard, but the pay off is worth it.
But, it’s never that easy, is it?
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Rottencrop -
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You find yourself out of a job, on the verge of getting kicked out of your apartment because you can't pay the rent and no where to go. Until your newest skeleton friend suggests you move in with them and their cousins until you get back on your feet again. You didn't expect to like living with this many people at once so much though...
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Holy cyclops!Could you believe that's an actual word?Anyways,here is a collection of one shots of the sanses either being wholesome,hating,or having sex with eachother.
Requests?𝐎𝐏𝐄𝐍...Their open!
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i'll rip in hands and teeth and take a bite by orphan_account
Fandoms: Undertale (Video Game)
28 Jan 2026
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“Just one bite,” Dream coaxed softly. “Please? You can tell me if it’s awful.”
Nightmare hesitated, gaze lingering on the offered food as if it had personally insulted him. Then he sighed, long-suffering, dramatic.
"If I must," he said. "But if it’s bad, I will not spare your feelings." There was no teasing in his tone. Only sincerity. Absolute, devastating sincerity.
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Let go through some spicy scenarios as add ons
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1930's America.
You survive based on your connections,
Territory is divided by humans and monsters,
What happens when you find yourself on the wrong side of the fence?
(Y/N), a sweet woman in her 20's, too intelligent for her own good, she's fully aware of her fathers dodgy dealings, however can she figure out What happens when he goes missing? and how can she fix being caught in the crossfire?
Does it accept or does it refuse...A mafiafell sans x reader story, it will be VERY graphic, VERY angsty and equally as smutty,
this is an 18+ story.. you have been warned. -
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Nightmare asks Cross for help dealing with his screaming instincts, so Cross does.
Series
- Part 2 of Omega Nightmare Fics because I'm obsessed
- Part 2 of Dynamical Change; The Series and Extras