Undertale (AUs)
190 stories
★wonderland★ {Au Sanses X Reader} (DISCONTINUED) by HiatusLazyWriter
★wonderland★ {Au Sanses X Reader} (DISCONTINUED)
HiatusLazyWriter
  • Reads 42,042
  • Votes 764
  • Parts 21
A small feeble princess, she had wished for a normal royal life, but her wish was too extreme to come true, it never was gonna work in her mind. The coronation was a disaster, her kingdom was a disaster, and her whole life was a disaster. To the lost lives and to her parents who sacrificed their lives for her safety, She had held a promise that she will avenge them, no matter the cost, no matter what problems she faces, she will keep this promise till eternity till she dies or successfully avenge them. Blinded by rage and sadness she had thought it was all their fault, ever since they came into her life, ever since HE made a promise, it all went downhill quickly. That's what the voices had told her, was it all a lie? Are they really the cause?
ℭ𝔯𝔢𝔞𝔱𝔦𝔳𝔢 𝔐𝔞𝔤𝔢(Sanscest Story) by ReaderReads10
ℭ𝔯𝔢𝔞𝔱𝔦𝔳𝔢 𝔐𝔞𝔤𝔢(Sanscest Story)
ReaderReads10
  • Reads 55,522
  • Votes 2,560
  • Parts 53
Monsterkind can't gain anything without first giving something in return. To obtain. Something of equal value must be lost. That is Mages first law of equivalent exchange. And in those days, we all thought that it would be and one worlds only rule. so many questions fill the world. Will we be able to find an answer to them all? Or will we stand unknowing what lies ahead. (Originally kinda Inspired by Fullmetal Alchemist ) -Errorink -Crossmare -Afterdeath -Kréme -Dustberry ___________ Side ships, maybe... uwu
Regrets(Sanscest story) by ReaderReads10
Regrets(Sanscest story)
ReaderReads10
  • Reads 7,394
  • Votes 372
  • Parts 20
Sans slowly died and faded into dust due to the genocide happening in his universe. That had to be the end of it right? But no, he had to reincarnate into someone else's life. Now his old previous life was over. His new life as, X Cross. Was just the beginning. (Takes place in modern era) _______ Sides ships will come in- Kinda Crossmare
More Than Friends (UF Sans X-Reader) by RonaToresu
More Than Friends (UF Sans X-Reader)
RonaToresu
  • Reads 273
  • Votes 3
  • Parts 11
(Y/N) meets two skeletons while monsters are leaving the underground. She becomes friends with them, and enjoys their company. She's completely opposite from Sans, but will that keep them away from being more than friends? In this story, Frisk is 16, and acts a bit girly, but doesn't believe gender should have an impact on actions, so they don't reveal their real gender! This is directed towards girls, so sorry boyos! Always open for requests for chapters! <3 Remember, Sansy loves you! (>w<)
Underfell Sans x Skeleton Reader by Lightblue_Snowflake
Underfell Sans x Skeleton Reader
Lightblue_Snowflake
  • Reads 13,053
  • Votes 194
  • Parts 22
A story of you falling in love with uf sans. first story. Leave a comment on how you liked it. Art is not mine! I'm doing an UF!Papyrus x Skeleton Reader next.
Not Good Enough (UF!Sans x Reader) [COMPLETED] by the_pacifist
Not Good Enough (UF!Sans x Reader) [COMPLETED]
the_pacifist
  • Reads 19,291
  • Votes 919
  • Parts 20
The dialogue in chapter 4 was inspired from the comic "Sooner or Later You're Gonna be Mine" from STARINGBACK :) *** It's hard being nice. If someone's mean to you, you can't do anything about it. You just smile and hide your crumbling soul. This is what (Y/N) has to deal with constantly. Her family is always telling her that she's not good enough, that she's too wimpy, that she should be more like her cousins. Eventually, this pressure causes her to snap. She tries to end it all. But... She starts something new instead. Pronouns used in this story are she/her :) Disclaimer: None of the art used belongs to me!
AU Sans x Reader oneshots 3 (Complete) by ReaderReads10
AU Sans x Reader oneshots 3 (Complete)
ReaderReads10
  • Reads 118,297
  • Votes 2,236
  • Parts 38
( ̄▽ ̄)ノ Well I told you this book wouldn't come to an end. Anyways requests are open, and yeah. Lemon isn't allowed. That's basically it. •Cover made by me Art does not belong to me
The Chosen One To Fall [A Kustard Fanfiction] by QuxxnFlixx
The Chosen One To Fall [A Kustard Fanfiction]
QuxxnFlixx
  • Reads 23,525
  • Votes 705
  • Parts 5
Inspired By My Favourite AU, Flowerfell. Over a few hundred RESETS later, one of the RESETS had gone wrong and had Undertale Sans appear in Underfell. However, everytime Underfell Frisk RESETS from dying, a flower appears on Undertale Sans. Undertale Sans then meets Underfell Sans, who at first wanted to kill him, but then realises the flowers that appeared everytime Frisk RESETS. He spares him, and took care of him. As time goes on, he fells in love with him. But, he knows that Undertale Sans can't live for long...
An Unlikely Love story (Uf sans x reader *x Uf papyrus?*) by CheshireSinner1
An Unlikely Love story (Uf sans x reader *x Uf papyrus?*)
CheshireSinner1
  • Reads 7,539
  • Votes 92
  • Parts 10
If you like Underswap, i'm sure you'll like Underfell too. Who will win your heart? I hope you made the right choice ;)
Don't Cry. (Fell!Sans x FlowerFell!Frisk) Flowerfell by WattaTopWriter
Don't Cry. (Fell!Sans x FlowerFell!Frisk) Flowerfell
WattaTopWriter
  • Reads 31,344
  • Votes 761
  • Parts 24
(Maybe he loved me when he took me by the hand, and tried to understand. ) "Don't leave me! Don't be the seventh maid in the row!" He tried to understand me. My answer was laughter soft; as I lowerd my head "Your too late...I'm afriad this flower's already dead. " The flower replied. -------------------- Scattering petals down without end.. I said; "Stay with me.. I cant see any-where else we can go.." I held her "I'm sorry, this flowers already dead. " ---------------------------------------------------------- WARNING: swearing, Brutal stuff.. (NO GORE) maybe some lemon... *Flowerfell was a challenge! BBUT I DID IT! ✨✨✨✨✨✨