1 - 20 of 361 Works in Fresh Sans (Undertale)
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Killer has heard of a pond that turns people into mermaids at midnight during a full moon. After setting out to prove it wrong, things go awry.
Note: The first 3-4 chapters or so were written a year ago, but they have such a unique soul to them that I'm not rewriting.
Updates semi-daily until August, meaning I'm trying to write one chapter every day and may or may not succeed at this task. -
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An AU I made up because no one has ever thought about making Nightmare eat the positivity apple even though Dream eat a negative apple so here it is
- Language:
- English
- Words:
- 1,229
- Chapters:
- 1/?
- Kudos:
- 6
- Hits:
- 49
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Error's had a stressful day and was only working himself up more, Fresh knew what to do, much to Error's annoyance.
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The whiteness greeted you as you woke up again. It felt almost suffocating, especially when the only other people with you didn't exactly look or act normal. You just wanted them to emote, even a little bit.
All you wanted was to not be alone but no. You were reborn as Ink after you died in a lonely ditch. Now you have to navigate the vast Multiverse with your knoweledge of your last life. As you get friends and foes alike, you notice that not everything you know is trustworthy. Especially when you're a little lost skeleton with questionable ability to feel.
After all, anything could happen in a place this big.
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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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Hello, my name is Mazy, now that you will be a reader soon, you are known as a Mazyville, I'm nonbinary and go by they/them. My favorite fandom is Undertale and its alternative universes. I write semi-literate so all can understand well. English isn't my first language, though, so don't be too bitter.
I'm not a new writer, but I've never written on AO3 before. I'll be taking requests for any fanfiction Idea you have, not a short, but I'll make a not-so-long story about it. Just comment with your main idea or a summary of what you want your story to be, it can be ANYthing and ANY ship.
READ THE REST OF IT TO FIND OUT MORE!! AND READ THE NOTES!!!
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★
Following his mother’s unexpected suicide, Nightmare and his cousin Reaper are sent to a boarding school in New York by Gaster, a private investigator and close friend of their family, following the mysterious disappearance of his aunt Ren. The circumstances are odd enough, but when they discover the cryptic note she had left behind, urging them not to search for her, the two cousins suspect there’s more to Ren’s disappearance than meets the eye.
To make things even stranger, Nightmare begins having vivid dreams, revealing fragments of what he thought was the past, but turns out to be the future. In these visions, he discovers his mother’s hidden secret: he has a twin brother.
Alternatively, Reaper isn’t fully convinced by Gaster’s promise to search for his mother. Deep down, he believes that her disappearance is far more complex than they’ve been led to believe. Determined to uncover the truth, he resolves to investigate the mystery on his own, no matter what it takes.
As the duo prepare for the fresh start ahead, they must keep their double lives hidden from the high school world— where nothing is as it seems and everyone has something to hide.
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The Omega Timeline's Multiversity of Science and Magic by WaterLily1
Fandoms: Undertale (Video Game)
06 Jul 2025
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The Multiversity- a college run by Core Frisk and their Omega Timeline Council. It welcomes students from across the multiverse, no matter their backgrounds. While there are always some challenging students, this year boasts an exceptionally wide assortment of unique faces. Many of whom are neither thrilled to be there, nor fans of their administrators.
In other words: A college AU featuring all your favorite Sanses. True stories from wild college experiences sprinkled in with general chaos and disaster as skeletons from various backgrounds are shoved together in a classroom setting and given way too much freedom.
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Fresh didn't think lamias existed that is until getting caught with a fight that their life turns for the better
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Mutualism (bc I cant think of anything else) by A_random_gay_shlyukha
Fandoms: Undertale (Video Game)
26 Jun 2025
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What if when Passive nightmare ate the negative apples he didn't just not die.
But he got an annoying parasite that doesn't know basic human knowledge.
*I don't know how else to write this, but basically passive is the host and nightmare is the parasite.
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Ink, Dream, and Blue go down to the beach for a day. While there they run into some friendly faces! Ice cream, pinball, wave tackling and sandcastle building abound!
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- Part 1 of UTMV Domestic AU
- Language:
- English
- Words:
- 3,416
- Chapters:
- 1/1
- Kudos:
- 8
- Hits:
- 114
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When a 90s jester skeleton one day decide to skedaddle himself into your everyday life casually without hinderance - you don’t know what to make of it at first.
Living life in a world where the closest thing to a ’real-life’ skeleton appearing before you is only during Halloween - the very impossibility of his eccentric appearance and over the top personality pulls you slowly in.
Having being dealt a bad hand with existing and simply living lately due to a difficult personal loss, you warily assumes he wants something from you with this ’forced’ friendship.But the more time passes in his company, the more you realize that - perhaps he genuinely just wants to be your friend despite your differences? And why does it feel like he knows things you’ve never told anyone before about yourself so… easily?
…Tho, why is he so adamant about never taking those shades off..?
*A feel-good story about the values of friendship, laughter, the gift of living and possibly the meaning of having a Soul.*(Rating may change later on)
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“The claws of the dark threaten to rip the forest apart.”
As Greenleaf draws to a close, tragedy after tragedy strikes the clans, orchestrated by a cat from the shadows. Four cats help the rest find their way, and lead the woods back to peace.
(I don’t know how to write summaries but like trust the fic will be good I am literally cooking rn.)
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9:20pm | Kills 🔪: wait the toaster just exploded
9:20pm | Cross ❌: Not again
9:20pm | Kills 🔪: no generally
9:21pm | Kills 🔪: It is smoking
9:21pm | Cross ❌: Uh oh
9:21pm | Cross ❌: Better go sort that out then
9:21pm | Kills 🔪: Dw Horrors ran to it
9:22pm | Kills 🔪: I might make it worse if I sort it out myself -
It's the end of the world as we know it (and I feel fine) by Enderlovescake
Fandoms: Undertale (Video Game)
22 Jun 2025
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Summary
Just a small fic about the gods of my Multiverse.
Series
- Part 9 of Deltaverse
- Language:
- English
- Words:
- 291
- Chapters:
- 1/?
- Kudos:
- 6
- Hits:
- 33
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Summary
Fresh keeps possessing Ink's body.
Ink didn't like that and destroyed more of Fresh's parasitic kind.Fresh didn't like that either.
The tags are there for a reason. -
Multiversal Transplanting is NOT a Thing In Gardenview by bblue_berror
Fandoms: Dandy's World (Roblox), Undertale (Video Game)
18 Jun 2025
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Summary
Flowey and Dandy switch places, which causes far too many problems in the multiverse and in gardenview.
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Positivity flash! Adventures of the chessboard! by Songwolfwild
Fandoms: Undertale (Video Game)
14 Jun 2025
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The 4 friends (debatable), Fresh, Cross, Error and Ink, defend the world from Nightmare and his gang by transforming into legendary warriors! With a flash of light, will these intrepid heroes succeed or will they end up 6 feet under?
Inspired by Madoka magica and pretty cure!
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A Strange Family include... by LittleNinjaSpy
Fandoms: Harry Potter - J. K. Rowling, Undertale (Video Game)
06 Jun 2025
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A strange family includes: at least four skeletons, a corrupted god and a human toddler.
When Nightmare saw baby Harry being left on the Dursley's porch while he was taking a stroll (read: scaring random people for fun), he was intrigued and disgusted that someone could leave a child like that. But when he got closer, he was surprised and worried—really worried. The child was surrounded by foreign magic and much more than what could be considered normal. So he took him; what could go wrong?
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It let out a keen, stilling, but not getting closer, not even letting its leash slacken. That was enough though, and he took a few leisurely steps towards it. Fresh shook, but didn’t flinch back when he cupped its face in his hands.
“Good boy,” he cooed, rubbing at its cheek with his thumb. “I’ve trained you so well, haven’t I, darling?”
Series
- Part 2 of Straydog AU