1 - 20 of 8,721 Works in Sans/Sans (Undertale)
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Art from: TumblrИнк и Эррор – два извечных врага, ненавидящих друг друга, но за маской бесконечных битв и разрушений скрывалась тайна. Все началось с невинного предложения посмотреть вместе сериал за коробкой шоколада. Постепенно, день за днем, между ними вспыхнула симпатия, переросшая в нечто большее. Теперь они – любовники, скрывающие свои отношения, боясь осуждения и непонимания.
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my idea of romance is pure violent devotion． by necropathy
Fandoms: Undertale (Video Game)
27 Oct 2025
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“You’re trembling,” Sol murmured, delighted. His voice was syrupy, cloying, a honeyed lullaby laced with thorns. “Worked up already, baby?”
Nightmare convulsed beneath him—struggling, snarling, humiliated. He twitched, spasmed against the chains. His limbs jerked without rhythm. He didn’t have control anymore, not really.
And Sol knew it.
- Language:
- English
- Words:
- 437
- Chapters:
- 1/1
- Hits:
- 3
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Exactly what it sounds like; Flufftober 2025 with UTMV, except there's a different ship (almost) every chapter. Every chapter is in a different universe--except when they aren't. I don't know what else to say. Expect OOC-ness and fluffiness.
Also, I apologize, half of these ships do include Nightmare. I have a favorite.
Now including a table of contents!
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i have hands for building altars， lips to pray to reckless gods， i was made to be a devotee by necropathy
Fandoms: Undertale (Video Game)
27 Oct 2025
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The Guardian of Negativity writhes in his threads as Error works, each twist of his body only tightening the noose around him. He’s nearly finished now. Nightmare should’ve known better than to step into this place—“business” or not. This isn’t an AU, not exactly—but it is his territory. And here, the rules bend for him.
The creators like him in this place.
Even now, their voices echo around him, clamoring with delight like a distant war drum, hungry and laughing.
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I ran out of tag room, so it’s being split up! Hope you enjoy nonetheless!
Series
- Part 2 of Cactus’ Kinktober 2025
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The Castles newest additions are trying to adjust to the change in their lives. Living amongst an Outcode and his subordinates. One in particular the castle residents seek to keep hold of. Past and current wounds have made that rather difficult for them to convince this individual. Will they choose to show a side of them that most don't see?
Series
- Part 4 of Kaleidoscope
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Disclaimers:
Several details in this fic are heavily inspired by 'Blue joins the bad sanses' comic, so go check that out
Canon innacuracies: Passive and Corrupted Nightmare are the same person, Ink is the creator and not the protector, Ink, Error, Nightmare, and Dream, are all gods, Blue, Killer, Horror, and Dust's specific au timelines were all destroyed, and i took liberties with how the void works. Also, no Cross sans will be mentioned, i don't know enough about underverse, and there will be some OC non-sans God/entity/things later on. The fic will be split into parts, each lasting nine chapters.
Schedule: Once a week, on Saturday, Sunday, or Monday, and i will post art or a reference sheet with every chapter. Trigger warnings will be specified in chapter notes. I've never written for undertale before, so please let me know what you guys think :3With that said, the actual plot: After an injured Error crashes into Nightmare and Co's home, a close bond starts to form between the two gods, both forced villains. In light of Ink's attempt to kill Error, Dream finally starts to lose it, and Blue gets dragged along.
Average chapter length is 500-2000
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Nobody asks to be a god footnotes/extras by Ev3lyn (Candle_The_Cat)
Fandoms: Undertale (Video Game)
27 Oct 2025
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now on ao3 as well as my tumbrl
this is bonuses for another fic. dont read it otherwise, it wont make any sense
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IT'S THAT TIME OF THE YEAR!
Kinktober time~!So yeh this is basically short drabbles of smut. Some will be longer, some will be shorter but I'm gonna try my best to make them juicy~
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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
26 Oct 2025
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New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
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Kamari333's Kinktober shorts, following the prompts set along HERE.
Another year of Kamari333 doing their best to celebrate Kinkplay and the fun of erotica <3
Individual tags in the chapter summaries and notes.
Functional Table of Contents (with tags and warnings) included!
Series
- Part 9 of Kamari333 Kinktober Archive
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Killer fucked up, and oh boy, Nightmare is PISSED. Killer will have to deal with Nightmare's punishment and keep going forward despite losing all hope.
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Nightmare sends Killer to the Anti-Void, house of the crazy destroyer of universes, as a punishment, and Killer has to survive and, most importantly, get out of there as soon as possible... or not. -
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A sweet little series set in a world where monsters had been captured from the beginning instead of shoved underground.
Eventually, as the years and generations pass, both humans and monsters slowly forget the monsters were ever free.
We follow the story of an aging little zoo hoping to expand and take in a few monster pups. And the stories of several monsters who find themselves being transferred to the place.
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Some nice soft lovin with Afterdeath
Series
- Part 26 of Kinktober 2025
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Nightmare can't hide it anymore... Killer remembers their first kiss and the next big step is on the way
Series
- Part 2 of Our Little Loves, For Good or For Bad
- Language:
- English
- Words:
- 3,229
- Chapters:
- 1/?
- Kudos:
- 9
- Hits:
- 53
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The Multiverse is dying. The balance has been tipped too far and now it threatens to crash down around everyone. But Dream believes the answer to their survival lies with their newfound Destroyer.
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Ink has never been a good sleeper. He rolls around and sneaks out of bed and is constantly staring into space with wide eyelights, all while he should be sleeping like a normal monster. So, Error, being the good boyfriend he is, takes him to Sci to get meds. Little does he know, Ink is about to screw everything up and put him through the consequences.
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Cream Book book of Cream by Pie_code
Fandoms: sans ensemble - Fandom, Undertale (Video Game)
25 Oct 2025
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I like Cream. A lot. So I will put all the writing I have of them here!
Chapter 1: Dream Angst
Chapter 2: Cross Angst
Chapter 3: Cream Fluff -
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collection of lil fics ive posted on tumblr
Series
- Part 2 of drabbles/ficlets
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Killer is an average, gender-conflicted "woman" living her life in early 1950s Boston, dreaming of something more interesting and searching for her "One" until one day, a close friend reveals his secret and suddenly her life changes in an impossible way.