Sanscest - Freeform
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Summary
They say to learn to love others you must first learn to love yourself... well, that's probably bullshit, but Sans is up to try it anyway.
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Us! Sans needed to run from his brother. He ran deeper and deeper into the trees until he collided with a stranger.
The stranger turned around and glared at Sans with angry red eyes. Sans knew that this sharp-toothed skeleton wasn't having his day either.
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UF!Sans fights with his brother and doesn't know what to do with himself. He ends up traveling to the Undertale Universe where he meets the kindhearted Sans and Papyrus.
UF!Sans has to come to terms with his depression and his newfound feelings for the other skeletons.
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NOTE:
If you are choosing to marathon this fic, I recommend placing a stopping point at the end of Chapter 24. Yes, I am aware that you may want to continue past that, but it is where I've divided the fic in my head.
Part 2 (Chapter 25 and on) has increasingly dark themes. Please be advised.
If you are not aware, "Choose Not To Use Archive Warnings" is not the same as "No Archive Warnings Apply." Please read each chapter's notes sections for warnings specific to the chapter.
Thank you, and enjoy! :3Series
- Part 1 of To Love Yourself (Series)
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All requests i've written or drabbles i've come up with.
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Papyrus tired for all reset. Chara finished Genocide and now, althought pacific, Sans allways die, in the end. He don’t want to see his brother die again. And the meteor comes down…
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Blueberries and Cherries by orphan_account
Fandoms: Undertale, underswap, Underfell - Fandom
27 Apr 2016
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"Well,it has to do with two Sanses-a salty tsundere-and a bunch of small blue flowers.
Or in other words,a hell of a story.
This,so happens,to be the beginning of this story."
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FellSwap- An Act Of Kindness by CloverTheGamer (orphan_account)
Fandoms: Undertale (Video Game)
25 May 2016
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It all started with a small act of kindness.
Its about UF! Sans and US! Sans btw :3
And MAYBE some fontcest (gonna be added possibly :3)
DONT READ MY CRAP xD. IT SUCKS -
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Underfell Papyrus and underfell Sans find something unique one day when patrolling the forest.
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Don't call Ink,"Inky"
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Underfell Sans accidentally ends up in the what he thinks is the strangest alternate universe imaginable: Underswap. Unable (or perhaps unwilling) to find a way back to his own universe he's forced to stay with the bizarre alternate versions of himself and his brother. But in the end he might actually end up kind of liking this strange happy version of himself.
Series
- Part 1 of Strangest Universe
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Nightmare by C4N1S4NUB1S
Fandoms: Undertale, Undertale AU - Fandom, ErrorTale - Fandom, Inktale - Fandom
06 Aug 2017
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Error gets a nightmare days after leaving the AntiVoid. The only person(or skeleton) there to comfort him is Ink who was the on who convinced him to leave the AntiVoid in the first place.
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Blueberry Handjob by I_Write_Sans_Not_Tragedies (orphan_account)
Fandoms: Undertale (Video Game)
29 May 2016
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Blueberry and Red get a little funky and Underfell Sans shows off his sexy skills. It's Underswap's first time, though, so really he could be awful at giving handies and Blue would still love it.
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Making Purple by I_Write_Sans_Not_Tragedies (orphan_account)
Fandoms: Undertale (Video Game)
05 Jun 2016
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Underfell Sans forgets about his date with Underswap Sans and gets high instead. After getting an angry scolding from his brother, UF!Sans and US!Sans have a fun time fucking like rabbits.
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learn to love by I_Write_Sans_Not_Tragedies (orphan_account)
Fandoms: Undertale (Video Game)
22 Dec 2016
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Blueberry likes Red. He's funny, and kind, and although he's had a rough past, he's a really great guy. Of course, they're different versions of the same person, and they live together, but that doesn't stop Underswap Sans from finding himself infatuated with his friend.
Maybe if things were different, Red would feel the same way. But Blueberry deserves somebody better than a fucked up skeleton with mental issues and five tons of emotional baggage. He deserves somebody who is just as kind and selfless as he is, who can make him happy and be there for him no matter what. He deserves somebody who isn't Red. At least, that's what Red believes.
Series
- Part 6 of learn to live
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Underfell Sans,Science Sans,Underswap Sans,and Underswap Papyrus go ice skating. Turns out Fell sucks at it. Fluff and embarrassment happens. Also they laugh at each other. I hope you enjoy this. Tis my second fanfic so don't judge. Also...DONT READ IF YOU DO NOT SHIP THIS!! You may comment suggestions for more fics. Love ya,peace.
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- Part 2 of SciFell Sins
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Blueberry gets picked on for being childish and Red reassures him that he's the coolest person ever.
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i swear this is automatically posted onto tumblr by the ao3 undertale feed bot.
Its weird.
Enjoy
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- Part 5 of Sanscest fucking party.
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Papyrus, Sans and Red have a good time, until things go wrong.
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All they wanted was some goddamn pizza. instead they got some racist humans,badass Sci,angry and proud Fell,surpised Paps,and some embarrassed skeleton dorks. This took me for fucking forever!!!! Hope you enjoy!
Series
- Part 3 of SciFell Sins
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Underswap! Sans and Underfell! Sans are a couple now. Blue is experiencing his ninth heat and that makes Red so "happy..."
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Bookmarks which have used it as a tag:
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Sunset Boulevard by Helpimagayfish, Jannthebean
Fandoms: Undertale (Video Game), undertale mutiverse
20 Aug 2025
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Dream was so sure that Cross might have been the one. Even in the short time they’d been together, he would have told you that things had been perfect. But when a past history between Nightmare and Cross is revealed, it throws a wrench in the works and sets into motion a series of events that spiral relationships out of control. With things crashing down around them, it’s hard to say if things will ever find a balance again.
Bookmarked by SargeWritesFanfiction
14 Jul 2023
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- Left on Chapter 6 -
Sunset Boulevard by Helpimagayfish, Jannthebean
Summary:
Dream was so sure that Cross might have been the one. Even in the short time they’d been together, he would have told you that things had been perfect. But when a past history between Nightmare and Cross is revealed, it throws a wrench in the works and sets into motion a series of events that spiral relationships out of control. With things crashing down around them, it’s hard to say if things will ever find a balance again. -
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Summary
Blue comes to Red with a goal in mind, Red gives him a better way to achieve that goal
Series
- Part 2 of Prompt Adopts
Bookmarked by SargeWritesFanfiction
10 Feb 2024
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KINKtober 14 - Sensory Deprivation by FamousSmuggler
Summary:
Blue comes to Red with a goal in mind, Red gives him a better way to achieve that goal -
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Have you ever been to a movie that you don't want to see or too afraid to see? That is Lavender's case.
Don't get them wrong seeing a lovely movie with their husband Crimson is great just not the right choice...Will they survive to the end or will Lavender be humiliated by their fear of scary movies.Bookmarked by SargeWritesFanfiction
10 Feb 2024
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The Romance In the Movies by StrongMyst_Writes_5
Summary:
Have you ever been to a movie that you don't want to see or too afraid to see? That is Lavender's case.Don't get them wrong seeing a lovely movie with their husband Crimson is great just not the right choice...Will they survive to the end or will Lavender be humiliated by their fear of scary movies. -
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Summary
Nightmare is more than just a bad guy. He and his poly protect others, too. Maybe they can help Blue out of a bad situation.
Series
- Part 9 of Underswap #832
Bookmarked by SargeWritesFanfiction
15 Mar 2024
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Bookmarker's Notes
- Left on Chapter 26 -
The Opposite of Amnesia by yastaghr
Summary:
Nightmare is more than just a bad guy. He and his poly protect others, too. Maybe they can help Blue out of a bad situation. -
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Ink has a hard time grasping the concept of love, and Error spills his feelings for Ink.
Bookmarked by SargeWritesFanfiction
09 Apr 2024
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Summary:
Ink has a hard time grasping the concept of love, and Error spills his feelings for Ink. -
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Red was asked on a date and he didn't say no, but he didn't say yes either. He was too scared to say anything and now he has to go through with it. How does he get into messes like these?
Bookmarked by SargeWritesFanfiction
22 May 2024
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- Left on Chapter 1 -
Yer gonna make me see stars? by silverryu25
Summary:
Red was asked on a date and he didn't say no, but he didn't say yes either. He was too scared to say anything and now he has to go through with it. How does he get into messes like these? -
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Welcome to the oneshot book! You can request sanscest one shots. I've made 2 or 3 books like those before but this is my first book like that on ao3 so this will be fun-
_________________________________________"In fact, someone does love you." Cross perks up and looks at the other monster. Nightmare leans down and kisses his forehead before he goes out of the room. Leaving the blushing soldier all alone in his room.
Bookmarked by SargeWritesFanfiction
02 Jun 2024
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Sanscest oneshots by The_Borb_King_2020
Summary:
Welcome to the oneshot book! You can request sanscest one shots. I've made 2 or 3 books like those before but this is my first book like that on ao3 so this will be fun-_________________________________________"In fact, someone does love you." Cross perks up and looks at the other monster. Nightmare leans down and kisses his forehead before he goes out of the room. Leaving the blushing soldier all alone in his room. -
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Blue's dinners are awful, but his desserts are good. The problem is, dinner comes before dessert.
Bookmarked by SargeWritesFanfiction
07 Jun 2024
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Dessert by AshamedEproctophiliac
Summary:
Blue's dinners are awful, but his desserts are good. The problem is, dinner comes before dessert. -
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Sans is used to being bullied. So why is Red any different?
Series
- Part 22 of Scribbling is its own Language - Oneshots
Bookmarked by SargeWritesFanfiction
08 Sep 2024
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Knock Your Socks Off by yastaghr
Summary:
Sans is used to being bullied. So why is Red any different? -
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Summary
Error wants to leave a mark on the Doodle Sphere that his boyfriend, Ink, has just shown him. He comes up with a cheeky scheme to not only leave one, but tease Ink at the same time.
Series
- Part 24 of Scribbling is its own Language - Oneshots
Bookmarked by SargeWritesFanfiction
09 Sep 2024
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The Hunt for the Nest by yastaghr
Summary:
Error wants to leave a mark on the Doodle Sphere that his boyfriend, Ink, has just shown him. He comes up with a cheeky scheme to not only leave one, but tease Ink at the same time. -
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Summary
Passive often speaks to Corrupted about how he feels. He sees Corrupted in his dreams. He tends to rant to Corrupted about his day, his feelings, and soon enough they both get attached, falling in love.
Bookmarked by SargeWritesFanfiction
21 Sep 2024
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Nightly Conversations - Marenight by UTMVNightLight
Summary:
Passive often speaks to Corrupted about how he feels. He sees Corrupted in his dreams. He tends to rant to Corrupted about his day, his feelings, and soon enough they both get attached, falling in love.