21 - 40 of 3,250 Works in Sans Ensemble (Undertale)
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Once again I'm participating in the Rarepair New Year event, hosted by the wonderful Kamari!!!
As always, this is a collection of random ships and prompts/tropes, ranging from sweet SFW fluff to tasty NSFW smut. Expect a lot of Sanscest, but also some Papcest and cross-AU Fontcest. Individual ships and ratings can be found in each title.
I hope you'll like these little stories!
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Ever the curious and forgetful skeleton, Ink was considered to be quite the character by the majority of the people he knew. His friends were always exasperated by the kind of situations he managed to end up in, and when questioned about why he did what he did, he always responded with “for the plot.”
What happens when, suddenly, he becomes the plot?
Error’s there, too, because of course he is.
Fucker.
TL:DR: Ink and Error get stuck in some stupid coffee-shop, college AU. Ink is thrilled. Error is not.
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He stared into the white end at the edge of that void-covered cliff. At his side lay the so-called Protector, mutilated by his own hands. The Creators had abandoned them long ago; his family was a distant memory of destruction. With his heart completely locked away and his wings torn to shreds, he saw the end and leaped into its arms.
Then, they asked: "Would you be willing to save them?"
So that others may have their happy ending.
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Après avoir découvert que tu étais enceinte, ton partenaire t'abandonna
Tu croyais que tu allais te débrouiller en solitaire
Mais la vie décida autrement lorsque tu croisa le chemin de 5 squelettes, ou plutôt 6, qui décidèrent que tu leurs appartenais
Ils ne s’attendaient pas à s’attacher et tu ne t’attendais pas à changer
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After discovering you were pregnant, your partner abandoned you.
You thought you were going to manage on your own.
But life decided otherwise when you crossed paths with five skeletons, or rather six, who decided you belonged to them.
They didn't expect to get attached and you didn't expect to change
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Disponible dans les deux langues
Available in both languages -
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It has always been your dream to rise in life, even though many said it was impossible for someone of your class. But something your soul truly longed for was a soulmate. Anyone who carries a heavy burden wishes for another soul to be their anchor, their motivation. However, it seems you weren’t born to have someone by your side forever.
And now just because they’ve now become your soulmates doesn’t mean they’ll take away everything you’ve worked so hard to achieve.
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Inevitable Fate of Orchestrated Lies by FeralPossum_UniverseDestroyer
Fandoms: Undertale (Video Game)
23 Jan 2026
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An excerpt:
The careful song and dance that Error and Ink took part in whenever they were fighting went unnoticed. The fast fighting styles clashing together made it difficult to see where they were, not even mentioning seeing the moves.
It was a strategic choice. Because if someone were to see, they would immediately be suspicious and Fate’s careful plan would all be crashing down in an instant.
Where: Dream has questions, Ink and Error are in kahoots, Fate is present, and others are watching.!!WILL TRY TO UPDATE EVERY WEEK/OTHER WEEK!!
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(Remake of an old piece of fanfiction.)
Dream falls ill after trying to impress those around him, and Cross is unable to take care of him due to other circumstances. He ends up going to the last one he would even consider letting touch Dream.
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Erroneous Replacement by I_want_to_linger_a_little_longer
Fandoms: Undertale (Video Game)
22 Jan 2026
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This is a thing I did to explore the 'wake up as X character' idea, but with a bit of a twist.
This one starts with Error?
Series
- Part 1 of Missing Quarters
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The isekai body-making tool was evidently having a rough day.
Not only are you tiny enough to get snapped up as a snack, your body doesn't seem to have decided what species it is. Fish scales don't make any sense on a snake, right?
Wait... are you cold-blooded? Fu-
Series
- Part 1 of Undertale Extended Multiverse Fics
- Part 1 of Yeet
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This is a thing I did to explore the 'wake up as X character' idea, but with a bit of a twist.
This one starts with Dream?
Series
- Part 3 of Missing Quarters
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Nightmarish Situation by I_want_to_linger_a_little_longer
Fandoms: Undertale (Video Game)
22 Jan 2026
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This is a thing I did to explore the 'wake up as X character' idea, but with a bit of a twist.
This one starts with Nightmare?
Series
- Part 2 of Missing Quarters
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High School Of The Anomalous by EmeraldOnion, TheOtherOnion (EmeraldOnion)
Fandoms: Undertale (Video Game), Undertale Multiverse - Fandom
22 Jan 2026
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After witnessing Error do the impossible, Blue is determined to get closer to Error and learn about his secret. The world of supernatural abilities, however, is much more dangerous than he could ever expect, and now that he has fallen into the rabbit hole, there is no turning back.
Luckily, Blue will not have to do it alone.
Unluckily, Blue will not have to do it alone.
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Let go through some spicy scenarios as add ons
Series
- Language:
- English
- Words:
- 997
- Chapters:
- 1/?
- Bookmarks:
- 1
- Hits:
- 31
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Living in a cool new city with your best friends can only mean good things!
…right?
It depends on who you meet and how well you really know your new roommates. -
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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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Ray wakes up in a strange dungeon in a stranger castle with even stranger people...
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Blue and Razz are stuck inside a new Au, similar to their own. Luckily, they found each other due to unlucky circumstances. They both try to survive and stay hidden. All while being hunted down by that Sans of that Au, who's been deemed as Violet/Indigo (They're the same colors right?) They were able to avoid the Sans but they can't do it forever, they explore the depths of the au, maybe meet a few people, and learn about each other in the process. They're contradicting behaviors and moral conflict untill they meet in harmony.
However..their absences causes a bit of trouble in their home Au's...
Contains,
Fellswap (The red ones, not gold)
Swapfell (indigo)
Underswap -
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Summary
The first story of the series. Follows our protagonist through his rebirth and until he (re)enters the Multiverse.
In case you couldn't tell I suck at summaries, I'll get better eventually, probably.The Major Character Death Warning is temporary and happens multiple times btw, it is a little confusing at first but you will understand as the story continues.
Prologue: Rootverse's Collapse (1)
Arc 1: Rebirth (2-7)
Arc 2: Meeting Familiar Faces (8-80)
Sub Arc 2.1: The Teeth Incident (20-41)
Sub Arc 2.2: The Magic Incident (42-50)
Sub Arc 2.3: Time For Shopping (51-59)
Intermission: 1st Major Time Skip (60-62)
Sub Arc 2.4: The First Human (63-80)
Arc 3: The Tragedies That Follow (81-?)Series
- Part 1 of Miseries of Metempsychosis
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You have had a tough life that has left you scarred and untrusting of others. Growing up in a mage family obsessed with power and ensuring their lineage, you are the black sheep of the family, possessing a green soul of kindness and excelling in healing and growth rather than the combat magic your family specializes in. Trapped in a loveless relationship with a controlling, abusive partner chosen by your family to ensure a 'proper' match, you live in fear of triggering his anger, often resorting to your magic to heal yourself. Every aspect of your life is controlled by someone else, leaving you resigned to survival and scraping together what happiness you can.
What you could never foresee is the way a miserable night out with your fiance would lead you to a drunken one night stand with your soulmate.
Nor could you predict you would have 9 more soulmates out looking for you.
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You died.
Plain and simple, one moment you were there, strapped to the table in that ever so dark laboratory. Then a loud cracking had occurred - the sound of your own soul giving up. It had been deafening, like ice breaking beneath your feet. That purple crystalline heart shattering like fragile glass, unable to persist any longer.
The testing had been too much for you, not even you could persevere through it. Not after months—years.
You…died?
Then why were you here? More importantly where? What had
Gasterdone? And why did reality seem to glitch in and out with every painful thrum from where yoursoulshould be? And who were these skeletons that felt oddly familiar to yoursoul.>> Persevere?