Underfellsans Stories

You fall down into the Underground, thinking your life was helpless. Now....you realize your life is helpless without him....

Ink sans gets his paintbrush stolen by error sans and is now stuck in the underfell AU. Underfell sans Has to help Ink get out of his au and get his paintbrush back or all aus may cease to exist!

Mwehehehe! Look at that boys (and gal)! We have another A/ D for Blue! And you guys as well XD Us! Papyrus: *casually clapping* Uf! Sans: *watching Blue* Blueberry: *shakes head from side to side* // Now I'll try to answer as quickly as possible so >w<

Welcome to the Multiverse, a world where dreams come true, anything can happen, and the laws of physics could probably give up at any second and very few would care. With entering this world, however, you also agree to sever your timeline's temporal barriers, and promise to follow the new world's laws as thoroughly as possible. There is much you will not understand here; there is much you don't want to understand. Your old identity is not enough anymore. There are thousands of other "you"s running around, and they are just as valid, if a bit chaotic. You are no longer that person. You are no longer a "Sans", or "Chara", or "Undyne"; it is your responsibility to find a new identity. You may notice that you are changing. Don't worry; it's all just part of being something new. While you will lose your old identity, this is your chance to redefine yourself. Who you used to be is irrelevant to the person you are today. You will be known by your Found Name and Temporal Identity, not your universe. Those who used to be your "counterparts" aren't just other "you"s anymore; everyone is their own, and only their own. This world is yours to explore; this life is yours to live; this story is yours to write. Your past does not define you. Do you agree to the terms and conditions? ❤️* YES. * NO. ------ As a New World rises to shatter the boundaries between previously disconnected worlds and AUs, Blue, a new recruit of the Multiversal Bureau of Law from a recently opened Underswap Timeline, sees greatness just over the horizon. However, when a new set of dark timelines appears on the Entry List, things aren't off to a good start. ((A/N: This is a side-project, so it may not be very consistent update-wise, but I hope you enjoy!))

The bone zone.

Ships/Characters: Error x Ink Nightmare x Cross Killer x Dream Dust x Blue Horror x Lust Geno x Reaper Sci x Fell Fresh, Epic,Classic etc. Creators: Classic/UnderTale by Toby Fox Error,Fresh,Geno by CQ Ink by Comyet Nightmare,Dream by Jokublog Cross by Jakei Peñaloza Killer by Rahafwabas Dust by Ask-DustTale (?) Horror by Sour-Apple-Studios Lust by NSFWShamecave Reaper by Ren Blue, Fell, Sci by The Au Community Epic by Yugogeer012

Underfell is a dark and dangerous place filled with murder in violence, and Sans and Papyrus are the pinochle of it all. So nobody would ever suspect Sans to come back after a lost bet. Maybe you haven't seen all of what's under Red's mask, huh? Request for Icecream_Shipper

[Underfell!Sans × Bravery!Reader] [May contain swearing.] [Story is written in 2nd person] [Also found on Quotev.]

Y/n has been having a hard time with their mental health. After having many attempts to take their life, they are suggested an emotional support pet. Except this isn't any old pet. (This story is literally just for me but if other people read it, I hope you likey) Cover is drawn by me.

Hey guys, I hope you enjoy this Truth/Dare request based story with Blueberry *underswap sans* And Fell *UnderFell Sans* And my character Kat...You can ask them or dare them any questions and I'll try and answer as many comments as I can as soon as I can. Also feel free to ask them questions as well. I hope you guys enjoy the story!

Sans X Reader fanfics

Papyrus was never one to really care for anyone, but there are times when his armor isn't so tough. Especially when it came to his brother Sans. (Art not mine)

(Written for Soriel AU Week 2016 - Day 2: Underfell) What had happened had shattered her, and there was no one else that could understand her pain. At the very least, Sans started to think, he could help her stay hidden away. But that wasn't the only reason why, and he knew it.

(Note: installment in the A Knocking at the Door series, if you are unfamiliar with this then I would suggest you read it first!) This is the one shot collection of random events that happen between A Knocking at the Door and it's (soon to be) sequel, A Step Outside the Door. Requests are taken, and this updates literally whenever I have something to write and time to write it. I never said they would be all fun and games though! So please join me as we see the events that transpire between Sans, Papyrus, and Toriel on these completely random one shots. (If something isn't cannon to the story, I'll say so at the top.) (*sigh* Cover art is mine, regretfully... I am not a digital artist at all other than this, so I'm not really proud of it XD but still, my design and such.)

(DISCONTINUED) I have no Idea what to call this. Call It whatever you want. It's an Underfell Sans X Reader. You are in the role of Frisk in the Undertale universe, and something mysterious happens to your reset button. Oh, and you communicate to Chara through thought.

⚠️ Warning! ⚠️ In this story, the Y/N experiences depression. If you are not in the right headspace, please don't read this. I will also add warnings for if a chapter goes deep into her mind. *Reader goes by she/her* Your life, for the past few years, has been bland. You work from home, so you rarely meet people. Except when you shop. Even then, you barely have contact. Probably because your house is well known for it's 'history', so to speak. Your only company in this lonely life of yours is your dog and a few plants. But, one morning, universes shall meet and surprises will show themselves on both sides. *Undertale belongs to Toby Fox *Each AU belongs to their respective owners

i am a sans lover myself i know alot of AU's but underfell and underswap is my favorit~

Just a little book of mine~ I haven't started looking into other editions but I will do :) I'm doing a YouTuber one after this sooooo look forward to that!

There's 100 things he could've done but there's 1 thing he has to say to get him stay. They say brother's are inseparable but when disasters happen will that still be true?