Best Short Sans/Reader Fanfics
Sans/Reader novellas — 10k–50k words, perfect for a weekend. All curated from AO3 and ranked by kudos.
Top 7 Short Sans/Reader Fanfics
Ranked by AO3 kudos. Mid-length Sans/Reader fics — 10,000–50,000 words.
A Reprieve
by Or13M
When the quiet solitude of your new life is disrupted by a gaggle of skeletons moving in next door, you and your sibling find yourselves pulled into their orbit. Healing takes time, but maybe, this chaotic, affectionate family is exactly what your soul has been waiting for. *Inspiration taken from "
scrimshaw
by Mayumara
You were an ordinary maintenance worker, part of the crew of the Aurora when it crash-landed on an alien world and left you stranded in a hostile ocean. There are probably worse places to be stuck; at least the scenery is pretty, and you've always been passionate about marine life and alien research
Flower-me-not.
by B3_l
[Honestly.. After everything you've been through you didn't expect to find yourself here, in the middle of a fight between two men you recognized too much to be normal, with your unconscious husband in your arms having a near death grip on both newborns while you could at least stand without feeling
Everybody Here Wants You
by FuCkInG_FaBuLoUs
Hmm, such a thing of wonder in this crowdI'm a stranger in this townYou're free with meAnd our eyes locked in downcast loveI sit here proudEven now you're undressed in your dreams with me ~~~~~~~ You didn't cheat out of retaliation. To make things even. Perhaps some part of you did, a small vindicti
The Physics of Attraction
by pessimistic_frog
Most people spend their whole lives wishing that someone would come along and sweep them off their feet. But what happens when that person is already in a relationship? Who will fate honor? And who will be cast aside in the dust. And the more important question... who will get a better grade on thei
Crocuses, Oak Trees, Jasmines, and Edelweisses
by AleonaIceCream
You recently moved into this mansion, and a few days after getting all the stuff over, you have a thirst for waffles, but you don’t have sugar at home! Unable to wait, you walk to the neighboring mansion a couple minutes away, and find some things (more like a couple someones) that shake up your new
The one and only you
by Housanweiaaa
No summary provided.
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Why Read Short Sans/Reader Fics?
Novella-length Sans/Reader fics — roughly 10,000 to 50,000 words — let writers fully develop a single AU, trope, or relationship beat without sprawling. Plenty of time for setup, payoff, and a satisfying ending; not so much time that you're juggling fifty bookmarks.
Great for trying a new author or testing whether you'll enjoy a sub-genre before diving into something longer.
About This List
This list of 7short Sans/Reader fanfics spans 183,135 total words. Kudos range from 12 on the newest entries to 412 on the most established. Most entries are ongoing works, so subscribe on AO3 for update notifications. The most common rating is Mature (4 of 7 fics).
Recurring tags across this list: Horrortale Sans (Undertale) · Underswap Sans (Undertale) · Dreamtale Nightmare Sans (Undertale) · Alternate Universe - Underfell (Undertale) · Reader-Insert.
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