Burlesque AU! Frisk is running away from home when she comes across a club called the Underground. After meeting a dancer from inside who claims he wants to help her, Frisk gets sucked into a world she never imagined herself being a part of. When she's forced to become one of the girls by the club owner, an unlikely protector steps up to shield her from harm. {Mostly Sans/Frisk}

In a freak accident, Gaster has unintentionally created a human soul. Fearing his creation's demise, he hides it away in his lab. Little does he know that by creating this small soul he has taken on a role that he did not expect. He becomes a protector, a creator, a defender, and most importantly... He becomes a father to the soul.

I'm no longer going to be posting updates on here since the amount of activity and feedback I get here is significantly less compared to what I get on AO3. You can find this fic on ArchiveOfOurOwn here- (archiveofourown . org/works/6387460/chapters/14627251) And, as usual, you can find it on my Tumblr- (life-sans-sin . tumblr . com)

After their sons birth, Frisk and Sans are determined to be the best parents there ever was. However, raising a skeleton could be more then they bargained for. Follow them as they battle potty training, evil closet monsters, and the diabolical PTA meetings. Fluff warning, so fluff, much fluff. Some swearing.

You have a friend, though he may not actually exist, he's the best friend you've ever had.

Auvie has made a promise. A promise that has driven her to travel dimensions in order to fulfill it. However, she's found herself in the wrong dimension. Can she escape, and what will she find while she's there? (Underfell!Sans/Self Insert, sfw but suggestive, trigger warning for mentions of emotional abuse, violence, also sweating and swearing)

Toriel had finally finished her project, but there was one small hitch. You only wanted to help, but now rumor has it you had other motives. It doesn't help that Sans is back and he's not helping you put those rumors to rest. Which are unfounded, of course. You would never-and even if he DID-Well, it's useless to argue with monsters who have already made up their minds. M for smuts

(Open Deviant Art Chat-room; #AnatomyUndertaleFF) Frisk has spent many years underground with her monster friends, all is well in the world under the mountain. Well..until her monster friends start wanting to now more about Frisk. And some skeletons are a bit or nosey than others. Some videos that fall into the Underground aren't very accurate of Human Anatomy.

Summary: This is Underhell. A human king has taken the throne and rules the Underground with blood. You're a grown woman being thrown into the aftermath and only by making friends with a few monsters will you understand who the real ones are. Tumbler account is amartin22stuff for anyone curious.

Spoilers! Frisk fell into the Void, only knowing what she did to everyone and not remembering who Chara is. Frisk stays in the Void ten years before Chara frees her, and when Sans finds her what will he think? Will things be different for her or for him? We will only find out in one way. - Rated M for later chapters - FemFriskxSans Male Chara Cover by Aquinah Disclaimer within

This is an idea that's haunted me for a while so why not write it? When Alisa was little, she had a friend, though he certainly wasn't normal. Her friend had been a skeleton from Mt. Ebott. She hung out with him for years until one day, he stopped coming. Now, almost seven years after his disappearance, the monsters have come up to the surface... full summary inside! SansxOC

Waking up in the middle of the forest, you have no recollection of where you came from. Where will this lead? SansXOC I hope you enjoy my first, and hopefully not last, chapter story. Read, review and enjoy! (BTW I've never played the game, so there will most likely be errors and changes. So please be nice) Warning: there will be mature content in later chapters.

As Frisk matures, she begins to look back on her time spent in the Underground leading up to where she is today... As she grows however, she notices her feelings beginning to grow towards a certain skeleton, including getting a new form of attention from him. But once she reached the surface her nightmares began and urges to reset this timeline become more difficult to fight.

193X, the year where the Mafia and powerful families bloomed. Among them, stood two people that would change the history of Undertale City once everything fall into place. Hand in hand, both of them will carve the path of the tales of Undertale City. Sacrifices have to be made and out of the two, who will be taken and who will be given? (Gaster x reader) (Gaster!Sans x Reader)

One slip on the part of Chara, and a desperate act, has Frisk wresting control of the resets away from the demon possessing her mind. The next reset starts too early, in a place she didn't expect. Yet still, she has the DETERMINATION to save everyone. Even if it takes her whole life.. even, if he never forgives her. Fem!Frisk [ Sans x Frisk ]

The Genocide is over, Sans and Frisk have finally won; and they are all alone. But what if there was a way to bring everyone back? Rated M for mature because of language and violence. SansxFrisk. Ambiguous Frisk, no bonezone. Image belongs to rightful owner, UNDERTALE belongs to Toby Fox.

Monsters and humans are attempting to coexist on the surface. When a certain group of monsters and a new group of humans meet, bonds begin to form and friendships quickly blossom. The stage is set for something beautiful. SansxOC and MettatonxMaleOC (Rated M just to be safe.)

Mt. Ebott holds a long forgotten secret in its depths, and a young woman stumbles upon it. Monsters live here, and it's a bit different than the surface world she's used to. Maybe here she can make some new friends... and maybe something more? (Eventual SansXOC) (M to be safe)

This is my first attempt at a reader POV. Just a few weeks ago the barrier was broken and monsters are now living amongst humans. Meanwhile you're trying to run away from your dark past and your life hasn't been easy since. You try to find comfort in the small things that you can until someone sits next to you, igniting a tiny fire back into your broken soul. Rating may change.

Sans/FemFrisk some Papyrus/Frisk RATED M – For mature Monsters! I try to aim for Fluff/romance stuff but it's definitely going to be a bit smutty because I'm an awful human. Takes place after pacifist run after freeing all the monsters. Feeling like she should be more independent now that she's grown, Frisk decides to move out from Toriel's and in with the skelebros.

Frisk is female, and you surely intend to have a good time. ;)

"Earlier you said that you didn't remember me at all," says Sans, "but it looks like your body recognizes me well enough." Violence mixed with tenderness. Noncon/Rape.

There was only two rules. Don't fuck the skeleton, and in the case that you do, do no become his sex slave. Frisk somehow managed to do both within the first ten minutes of meeting him. Underfell AU.

Gaster and his human wife lived happily with there two children. Then they had a baby girl who was born human with powers like her brothers. After something happened. 23 years later for Sans and 21 years later for Papyrus they wonder what happened to there little sister. When a human girl shows up what will happen? Mention of abuse, spanking, swearing and parent/brother Sans

Dancetale AU, a few years after the Pacifist ending of the game. When life is this hard living among humans, there isn't much time to dance. Sans has nearly forgotten the feeling of moving to a rhythm at all, but she enters his life and reminds him how. Descriptions of OC left vague for a semi Reader experience. Dancetale idea belongs to teandstars on Tumblr.

A college senior starts a blog about Monsters and finds that Monster life is a lot more interesting (and complicated) than she had supposed. Mostly thanks to a certain skeletal comedian.

You are a human nurse that works at The Hospital of Humans and Monsters, name courtesy of King Asgore. Things are going well for you there, but there's always an influx of monster patients coming in with serious injuries caused by abrasive humans. Things go even further south when you find yourself being stalked by humans literally blocks away from the hospital... Smut later on!

When Flowey decides not to tell Frisk about a 'better ending', Frisk leaves the underground to try to find a way to free the monsters, promising to return when they are able. When Sans receives a call from Frisk four years later, she tells him she's coming back within a week, but not before someone else drops in. (M for language and possible sin later, F!Frisk, SansXOC)

You're just scared of them, you don't hate them. When your mom makes you go spend the rest of the summer with your grandma because you were being too lazy, your phobia intensifies when you're constantly being watched by them. Especially by a short skeleton - which by the way, seemed to scare you most for a reason. / ON HIATUS

In the Baby Bones au. After escaping the labs of Dr. Gaster, Sans is on the verge of death.

The old bookstore wasn't your home anymore, you finally realized. It was with them. It was with him. (Sans/Reader) (cover art by ballroomrittz)

In the light of the monsters emerging from the Underground, many of the human's legends of dark creatures have been mostly forgotten. However, all legends have a grain of truth in them, a seed of honesty. This is the story of one such creature, hidden in the shadows of society, simply trying to get by with what she was given.

Ebony has been stuck in the Underground for two years now. She struggles to find a way out of there, with hopes of finding what had been lost to her. She just wasn't expecting any... feelings to sprout while Underground, and it begins to interfere greatly with her plans of escaping. (OC/Sans, as well as a little bit of OC/Grillby. May contain smut eventually, but has some fluff!)

Sans has Frisk trapped in an endless cycle of death and reloads. And they can't escape it. They are at the MERCY of a merciless torturer. Underfell!AU

Sans was done with dating. He was well and truly done with girls, who only dated him for the novelty of dating a skeleton, not because they liked him or were attracted to him. It didn't matter that a pretty girl literally fell into his lap and kept shattering all his expectations, because he was not up for having his heart broken again. SansxFrisk, (not really a) highschool AU

You've always had a hard life, but you learned to survive in the most dangerous part of the city. When a nice day turns into a terrifying experience. You fall into the Underground. Can you learn to survive in a world of monsters as well? [Undertale and it's characters do not belong to me.]

Frisk is a young woman. She is a successful diplomat, and works hard to help Asgore and Toriel. But she also works with Gaster, the mysterious anomaly she met after freeing the Undeground. After a timeline reset, and a watch gone bad, she has to adjust to her new life, and Sans' new look. (M because maybe smut) SansxFrisk

20 year since the barrier has been broken and there is no sign of Frisk after they dissappeared. Are they dead? Can Sans deal with that? Can anyone?

"The resets...Chaos Theory...don't you get it? I can't keep doing this! I just can't!" Now 21 years old, Frisk is leading a pretty normal life in the human world. But when she decides to pay her old friends in the Underground a visit, she discovers not everything is as peaceful as she hoped and something evil has awakened once again... (SansxFrisk) (Rated M for adult content)

Years after the barrier was broken we follow Frisk and Sans as they set off on their new lives together. However a new, development, causes them to get ready for the hardest journey of their lives. Pacifist ending and spoilers. In my interpretation of this Frisk is female so please no hate, this is simply how I see them. Fluff abound, much fluff, so fluff

Dr. Alphys has created a machine that can turn monsters temporarily human, and asks Sans help testing it out. what happens when he doesn't know how to deal with the hormones that come with having a human body? Human!SansxAdult!fem!Frisk WARNING: HEAVILY NSFW, VERY explicit. art by Konoira on DeviantArt!

"Love thy neighbor"... But only if your neighbor is human. This is the thinking of most humans now that the monsters are free. With attacks by both sides, a second war looms over the heads of everyone. And stuck in the middle of it all is Leah. Takes place after monsters are freed. Eventual FemOc/Sans. M just to be safe.

You are an overly flirtatious voluptuous human who fell into the underground to escape from your surface life, but your past threatens to catch up with you when you meet the comical Sans. You desperately try to rebuild and entertain your new life in the underground in the best way you know how... by seducing him. Unlucky for you, he's on to your game. Sans/FemReader

I really suck at this part so um, Sans has a major crush on Frisk and always has dreams about her wearing his hoodie. Little did he know that the woman he loved so much knew about his dreams, and decided to make it real. WARNING Smut! Sex! You know that if you're looking at M rated things.

(Underfell) Sans has a slave she doesn't dress like a girl. Only when she's with her friend does she let her self come out. Unfortunately while out she comes face to face with the one thing she feared the worst. Rated T for sex, punishments and master/pet (squeal coming soon)

Frisk/ReaderInsert has moved out of Toriel's house in the Ruins and in with Papyrus in Snowdin. Now that Frisk/ReaderInsert is an adult she decides to travel alone to the Ruins through the woods to have a meal with her Goat Momster. Along her journey she happens to run into a boney wolf..

The worse & more scars a monster has in Underfell, the more of a badass mofo you are, & Sans wholeheartedly agrees... So then why is the fact that this... HUMAN having spotless, soft ass skin make Sans feel so... pleased? / / yes this is (18 years old!)Frisk/Underfell!Sans pining fite me / / alt. title: Sanscada- "Everytime We Touch (I Get This Feeling)" / / cover art by ttoba

W.D Gaster was an elusive man. Not too many people knew anything about him. A lab rat, hermit and shut in without much to speak of. The people that claim to know W.D. Gaster, do not know Wing D. Gaster- before the accident. In 198x, the project that Wing Gaster was working on, went terribly wrong and had lasting effects, hidden from the monster community.

UNDER 18 DO NOT READ, THERE WILL BE ADULT SITUATIONS. AND KIDS LIKE YOU SHOULDN'T BE READING THIS OKAY, RATED M FOR A REASON / Sans is in the forest when he's attacked by a group of monster haters, Kenzie is there and offers him shelter from the coming storm. What will happen. / Cover art by the lovely PlushySins from tumblr - check her out at

You'd grown addicted to the genocide run - what did that say about you? Regardless of whatever kind of tragedies lead your life, why did you have to go and take it out on the lives of those monsters, again, and again, and again? You're twisted, and now - You've gained the fate you deserve, the nasty, nameless player. UNLESS, OF COURSE YOU LEARN TO ATONE.

Running away from your past and hiding things will get you nowhere. Can you open up to your lovely new friends or will you keep everything in and let something else take control? You should consider the first option, especially when a certain monster caught an eye-socket for you.

Sans/Reader smut, with one-sided Sans/Papyrus/Reader. Reader is female. You've been without contact with another person for far too long, how will you react when innocent horseplay on movie night threatens to tip you over the edge?

Just a one shot i did, on tumblr posting here because i need a better place to put it. But Underfell Sans, red is a bouncer at a bar, has a crush on the cute bartender. Things happen and then an adult situation arises. Seriously if you re under 18 don t read okay, this is mature for a reason, with sexual situations.

There's an intimacy in the violence, a certain tenderness in the way that he holds your neck between his hands, that speaks to a deeper past between the two of you. Sans/Reader. Critique heavily encouraged. Contains violence, gore.

Just a fanfic between you and Sans. This is the female version.

After Frisk human's were banned from the ruins and forbidden to go there. Now a little girl as fallen down there she meets the monster's and the monster's met her. Will they think Human's have no heart or Will the little girl change that? Spanking of a child, pre teen and teen (Rated T for adult language and incest ) fatherly Sans and Papyrus

The human world is a suspicious, paranoid and bigoted place. The monsters realize this as their ending doesn't come as happily as they would have liked. Certain events have turned a small, pun cracking skeleton down and bitter, but all that changes when he meets a young human woman. Can this world accept a human and a monster together? Only time will tell...

Seems like just when he thought he had it all figured out... Well, he always was too lazy to prepare for the worst, wasn't he? Seeing Frisk on a hospital bed was not the reunion he wanted. Why the hell is she being so positive about this? Older Frisk x Sans. After the barrier. True pasifist run. Eventual M rating.

Faced with the choice of becoming homeless again or taking in monster roommates, Ashley Jones must bring her worst nightmares into her home and keep them safe from a stranger looking to harm them. Rated M for Violence, Gore, Adult themes, and Sexual Content.

Every life is precious. But when you are stuck in an endless cycle of resets, the thought of a new life can be a scary thing. Sans has done everything in his power to just forget about the one thing in his life he regrets but what will happen when Toriel finds out about it? Is there a way to bring back something that is lost? If there is, Sans is willing to try it.

Fawn was walking through the town after finishing important research for her academy; stumbling across someone in need of help. Follow Fawn a young magi in training's journey. Slice of life kind of story. Sans and Human OC pairing. Rated M for language, nudity/sex, and violence. Fawns character inspired from Final Fantasy 14 Realm Reborn.

You're left breathless and bone-crazed before a certain short skeleton comes home from work. He always sees right through you. Contains lottsa smut and sex NOTE: Wow thanks everyone. I didn't expect that many views in that amount of time. I mean it's Undertale, but still.