1 - 20 of 8,706 Works in Sans/Sans (Undertale)
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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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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.
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Progressive || ErrorInk || High School AU by Flynn (FlynnWritesToo), FlynnWritesToo
Fandoms: Undertale (Video Game)
19 Oct 2025
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Ink notices that someone has started watching him again lately, so in order to stay safe, he and his friends make a plan for him to pretend to date someone.
That someone is Error, who is not at all excited to go through with this, especially with the huge crush he's had on Blue since he was a kid.
However, the more these two pretend, the more fun they have. What will happen between the two? Will Ink's stalker leave him alone, or will it take a turn for the worse?Series
- Part 2 of Progressive Archive || Sans AUs
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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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After a truce was decided in the multiverse Error becomes increasingly frantic until he finally shattered the truce by destroying an au of OuterTale
Though nobody could imagine why.
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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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E-4 had had nothing. Brutal tests had been done on him for 4 years until he had finally escaped, killing the only person he had ever known. But he was still alone. Everyone had been evacuated a couple days earlier due to mysterious attackers. So, E-4 was alone for another 4 years until a mysterious, goopy version of himself offered him a home.
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My sans OC joins Nightmare's gang
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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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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
19 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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A wish for connection that would never be, for all that he would receive from that loveless relationship was the act of twisted desires. Manipulated into committing heinous acts. Error was doomed from the moment he uttered “I love you” Oh how he began to loathe those words.
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Bloodied Bandaids🖌🔪 by roxxroar
Fandoms: Undertale (Video Game), sans ensemble - Fandom, Underverse - Fandom, Super Dangan Ronpa 2
19 Oct 2025
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Ink talks with Killer to let it know that they're deciding to live for himself, and that love can be shown in many different ways. The name of this series is dedicated to Killer's problematic dependency on others, making him see himself as a TOOL(not the band); and Ink, to have another chance to get over their multifaceted apathy, seeing himself as less of an artist, but more of a MUSE.
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im lowkey reflecting on my two personal kins because I relapsed in SH a few days ago and I am an autoromantic individual. throw those two together and WHABAM!
Series
- Part 4 of a tool and a muse. V2
- Language:
- English
- Words:
- 1,503
- Chapters:
- 1/1
- Hits:
- 11
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Cross develops a terminal Soul disease, but his father only cares about his own reputation as a stellar Medical Scientist and uses his son(s) as lab rat to find a cure.
Series
- Part 7 of Nightmare's Clan
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After the primordial goddesses perished a the hands of their traitorous siblings, the old world fell in the hands of the Titans, who hunted down captured the gods, sons and daughters of the primordial ones.
Only after many centuries of war can the gods finally be rid of them and create the world again, like their mothers envisioned it.
But how can the gods ever move on?In this new world, full of cruelty and heartbreak, its easy for mortals to be hurt, broken. Most of them are left behind.
And yet in all this heartbreak, there is still one of the gods that will protect them.Series
- Part 1 of Ichorverse
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The gang starts to work on their feelings for others, now that the multiverse isn't in danger any time soon. Leaves time for self reflection and the first two to work things out are Horror and Lust.
Series
- Part 1 of Our Little Loves, For Good or For Bad
- Language:
- English
- Words:
- 3,101
- Chapters:
- 1/?
- Kudos:
- 1
- Hits:
- 16
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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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Some sensory deprivation with Sci and Lust
Series
- Part 19 of Kinktober 2025
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Mob Boss Carmine and Lounge Singer Lux don't see a future for their romance, but debts and obligations bring them together despite it. The attraction that blazes between them threatens to burn away the secrets that they've built their lives around. A series of monster kidnappings, Magic Prohibition, and the human mafia raise the stakes of their game even higher.
Oh, and they may be soulmates.
Love is a risk they can’t afford.
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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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As Killer falls deeper and deeper in love with Cross, the others begin to notice his decline.
Series
- Part 7 of The World Ended When It Happened To Me
- Language:
- English
- Words:
- 442
- Chapters:
- 1/1
- Kudos:
- 13
- Hits:
- 82
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Dust finds himself awake under the stars, staring into a sky that feels too peaceful for the life he leads. Cross joins him, uninvited, but not unwelcome.
[Flufftober - Day 18: Swoon]
Series
- Part 59 of Undertale Fics
- Part 69 of One-Shots / Two-Shots
- Part 7 of Prompt Fics