41 - 60 of 774 Bookmarks by c96e6386
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This is a participation for the tumblr of @undertailfanficcontest!
Theme: New experiences
Category: Hurt/Comfort
Sans and Fell have a healthy relationship well balanced between everyday life and their bedroom.
One day, Sans breaks this balance and Fell decides to take control back.Bookmarked by c96e6386
17 Aug 2025
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When the Great and Terrible Papyrus finds himself stuck with an even lazier copy of his brother, he didn't think this lazybones could be... interesting.
(Rating will change once I figure out how far I want to take the shipping. Currently non-romantic.)
Bookmarked by c96e6386
16 Aug 2025
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"YOU'VE GOT TO BE JOKING. WHY ARE THERE TWO OF YOU!?"
The words that will mark the beginning of a rather rocky relationship.
Or, a late Christmas Present
Bookmarked by c96e6386
16 Aug 2025
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Love's A Workout by CrushingOnSans (orphan_account) for SansyFresh
Fandoms: Undertale (Video Game)
09 Jan 2017
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Fell is a fucking tease. That is all.
Fresh, I know you were feeling a little down earlier and so I wrote this for you...I hope you like it lol
Bookmarked by c96e6386
15 Aug 2025
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Sans tries to help Red kick his nailbiting habit.
Things get out of hand.
Series
- Part 1 of Folksy Sayings
Bookmarked by c96e6386
13 Aug 2025
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Red and Edge are tasked with providing protective services for Sans, the old boss's kid. Sans provides jokes.
They really hit it off.
Bookmarked by c96e6386
13 Aug 2025
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Un Nuevo Ga-n-ster En La Ciudad by Duncan_G_Oscuridad_09
Fandoms: Undertale (Video Game)
08 Jul 2025
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Cuando Sans tiene un mal día el universo le recuerda, a diario, que siempre puede empeorar; especialmente cuando un niño humano aburrido tiene la capacidad de controlar el espacio tiempo. Sans esta solo -mientras sus viejos amigos están ocupados viviendo sus vidas por 2456 vez, incluyendo a su hermano que pasa la mayor parte del tiempo fuera de la casa-, nada nuevo. Buscando formas para mantenerse cuerdo en el bucle infinito que es su vida a causa del niño humano y la flor decide hacer una parada recreativa en el metro, más específicamente al único lugar donde la determinación del niño no puede afectar, el laboratorio escondido en lo más profundo de las entrañas de True Lab. Claro que mientras esta la maquina falla, y envía a Sans a. alguna parte.
Ahora atrapado en una Realidad alterna con todos sus conocidos como Mafiosos; Sans debe encontrar un camino de regreso a casa evadiendo a la policía corrupta, los metiches, las peleas de pandillas, las mujeres locas y un trio de hermanos muy interesados en conocer al nuevo esqueleto en la ciudad.. Y no como te imaginas. Menciono que también está adoptando niños? Y no, no está remplazando a su hermano,-ni está pasando por el síndrome del nido vació. Quien te crees!?-Series
- Part 1 of Sans Vs MobFell
Bookmarked by c96e6386
11 Aug 2025
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Laying eggs isn't always as easy as it should be. One late night, Tenna gives his poor friend a helping hand.
Bookmarked by c96e6386
10 Aug 2025
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Spamton and his new work pals have a good time getting to know each other... Which totally doesn't involve Spamton getting stuffed full of all their clutches and bred till he cant see straight.
Bookmarked by c96e6386
09 Aug 2025
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You know the meme going around? liking him isnt enough i need to get him pregnant? yeah... i think i took that to far...
- Language:
- English
- Words:
- 6,074
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 4
- Kudos:
- 238
- Bookmarks:
- 32
- Hits:
- 5,721
Bookmarked by c96e6386
09 Aug 2025
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Former Addison Spamton G. Spamton has woken up in Castle Town after being defeated as Spamton NEO. Now having resigned himself to helping the Lightners cut their own strings, he tries to cope with this newfound freedom and everything it includes as he waits for their return. As this is not the freedom he originally worked for all those years in Cyber City, this new "freedom" brings up ghosts from his past in the form of old rivals, abandoned friends, lost items, and most importantly the whereabouts of the NEO body that had seemingly vanished with the sealing of the fountain.
Series
- Part 1 of Keeping Neo Au
- Language:
- English
- Words:
- 159,689
- Chapters:
- 23/23
- Comments:
- 554
- Kudos:
- 1,507
- Bookmarks:
- 166
- Hits:
- 39,998
Bookmarked by c96e6386
07 Aug 2025
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after several weeks of awkwardly avoiding each other in the streets of castle town, and tenna leaving odd little gifts outside his room, spamton finally tries to start a conversation.
this is set in an AU where spamton and tenna both end up staying in castle town together!
Series
- Part 4 of Castle Town AU
Bookmarked by c96e6386
04 Aug 2025
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The Queen's palace was once a place of harmony. Under Swatch's careful eye, each day ran smoothly as a well oiled machine.
Until a certain pest invades the castle, that is.
Bookmarked by c96e6386
03 Aug 2025
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"Berdly, you need to lock in."
Bookmarked by c96e6386
03 Aug 2025
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Frisk accidentally wanders into the scene of a crime, Sans is tired, and a mugger has a very bad day.
(Or: why robbing children isn't as easy as it looks.)
- Language:
- English
- Words:
- 4,485
- Chapters:
- 1/1
- Collections:
- 1
- Comments:
- 47
- Kudos:
- 2,020
- Bookmarks:
- 503
- Hits:
- 16,313
Bookmarked by c96e6386
01 Aug 2025
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A case of mistaken identity gets Sans into some serious trouble. Hopefully, he can dodge the bullet and get out unharmed.
Bookmarked by c96e6386
30 Jul 2025
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Sans keeps teasing Red over acting like a rabid dog so Red decides to get revenge... with a prank... that goes very wrong... or does it? >:3
Bookmarked by c96e6386
29 Jul 2025
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Sans doesn't know why he agreed to go with Sci to explore the new Au, but he can't seem to regret it in the end.
Blood hadn't expected anything out of the ordinary to happen that day, but when a little skeleton wanders into his territory smelling of heat he can't help but he thankful for whatever higher power had gifted him such a perfect little mate.
Bookmarked by c96e6386
27 Jul 2025
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'Fin'ally some Tentacle Porn by comic4244, gaylie
Fandoms: Undertale (Video Game), Underfell - Fandom
15 Jan 2019
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Local socially awkward octopus saves a mermaid and decides to keep said mermaid. Mermaid Sans now has to deal with Red's awkwardness and inability to understand basic needs and personal space. A great combination for things to go wrong.
Series
- Part 3 of comic & gaylie's RPs
Bookmarked by c96e6386
27 Jul 2025
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Red and Sans are roommates, and they're so similar that they tend to drive each other completely insane. So guess who works out a deal?
Friends with benefits, no-strings-attached sex, I'm sure absolutely nothing bad will happen, right, guys?Official Arc 1 cover by Becky on Tumblr!
Official Arc 2 cover by Ganz on Tumblr! (contains spoiler)Covers also here by gallifreyan-pal and here by theamazingtrixy!
Series
- Part 2 of Free To Us
- Language:
- English
- Words:
- 91,942
- Chapters:
- 30/30
- Comments:
- 1,828
- Kudos:
- 1,046
- Bookmarks:
- 164
- Hits:
- 30,520
Bookmarked by c96e6386
27 Jul 2025