When Frisk runs away from the orphanage, his older sister Jett has to go find him in Mt. Ebott's forest and instead finds herself trapped in the Underground where she is introduced to her soul. Jett soon discovers that she holds a great amount of power and quickly finds out that there are certain Monsters in the Underground that want that power for themselves. (OCxSans)

A Sans x Human!OC lemon for all the naughty boys and girls. ;}

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

Sans had no idea what he was doing. He knew this wasn't going to work. He was too broken for this. But she believed in him, for a reason he could not comprehend. So for her sake, he would try. Even if he knew it was doomed to fail. After all, since when did anything good happen to him? Sequel to Underfell Angel

Lord Voldemort is taking the music industry by storm, and when Hermione and her friends get invited to an exclusive party featuring a private performance by Lord Voldemort, Hermione learns what all the fuss is about . Non-magic AU, Tomione. Crack!

Let me tell you the tale of two souls, A monster and a human. you could call them "soul mates"... they've known one another for many years. However, the timeline is suddenly rested and Frisk doesn't know whats going on. Rated M for future scenes, violence and language.

This is an UnderFell fanfiction. It also has Frisk as the main character still. (It's also Frans, so beware!) What if Frisk was held captive in The Ruins? What if Toriel never let Frisk leave? In this story, Frisk doesn't leave The Ruins until she is 18. When she does finally manage to leave, she realizes the Underground is a far darker place than she ever realized.

King Papyrus had a habit of retreating to his quarters after a long troubling day of managing the Underground. KING AU

She was his Light in his darkest hours. A vision his broken mind and created to help him deal with the pain. And now here she is. Real. Alive. His perfect Angel. Sequel to Underfell Fall

What if Frisk didn't leave the Ruins for many, many more years? What if, through some miracle, the human souls could be salvaged? What if... This all was true?

Pain was all he knew. If it wasn't the experiments, it was the beating. If it wasn't the beatings, it was... It was only a matter of time before he broke. REALLY DARK TRIGGER WARNINGS INSIDE

Underfell AU. Papyrus seizes the crown for himself, and declares Sans his queen. A series of one-shots covering the highs and lows of their reign, and everything in between.

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)

Sans is extremely depressed and in an effort to talk about it, Papyrus accidentally confuses his brother into thinking he reciprocated his romantic affection. Though Sans's feelings are very one sided, Papyrus can't bring himself to say so especially if it means keeping an everlasting smile on his face. FONTCEST

Pulling her hand sharply, he made her stumble into his personal space. With a toothy smile, he opened his mouth, revealing a gooey looking blue tongue no doubt made of magic. It ran across his teeth, and only now did Frisk ever notice how sharp they looked. "I'm a monster, kiddo."

"Who's there?" "Marry." "Marry who?" "Marry...me?" In which Sans is Sans, and sometimes Sans is an idiot.

Sansa takes a job at a brothel after she moves to Kingslanding and her first task is to seduce it's owner, Lord Petyr Baelish. [AU O/S - with the possibility to have another chapter/update if people want me to continue it] Read & Review. [Petyr x Sansa]

A small, fluffy O/S where Petyr apologizes to Sansa for the Ramsay situation and decides to leave Winterfell. Will she forgive his sincere apology or ignore his attempts to reconcile with her. Inspired by the 6x10 promo for the finale [Sansa x Petyr]

Chara has possessed Frisk for quite some time, making her kill the monsters she's grown to love, disintegrating her soul little by little in the hopes of taking Frisk's body for herself, but what will happen when Sans the Skeleton, who secretly has feeling for the merciful human finally figures out what's really going on? (Rated M for possible later chapters)

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)

This story follows Frisk through the underground, but a few things are different and suddenly no one remembers the resets.

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!

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.

Years later, Sans and Frisk deal with unfinished business. Unfinished sentimental business. Everyone needs a closure, one way or another.

Frisk has gotten older, and after working really hard, she finally has the chance to do something her heart wants. Adult!Female!FriskxSans fluff and then some... trigger warnings inside. M for sexy times and triggers! (Currently moving to AO3)

It's been several years since the Barrier was broken, and eighteen-year old Frisk is content with her loving family and friends. But her long-time best skeleton friend isn't as happy. He wants something. Or rather, someone. How in the world will he confess to her? Three-shot.

Sans reflects on the Groundhog Day that is his life, and all the way he has tried to break the reset cycle. He's stopped caring about others now, and masks his pain with shitty puns. But Papyrus isn't like the others, Papyrus is his baby bones bro and he can't bring himself to shut him out. But since when did Papy grow to be so big?

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.

Nineteen-year-old Frisk has led a happy, safe life after breaking the Seal that has hindered the Underground for so many years. But now, she faces a new struggle...a crush. And she has no idea how to go about dealing with it. (Sans/Frisk. Fluffy, sexy, with some occasional plot sprinkles thrown in. Hope you enjoy!)

"..That's exactly what love's supposed to do to you.."/Prequel to "Spin circles for me."/Older Frisk x Sans/M FOR ADULT LANGUAGE, DRUG USE, AND SEXUAL NATURE./

ReaderXSans. Sans is convinced that no one would like him if they figured out his weird kinks... but you, the reader, of course are able to quell him in a different way. NSFW. Biting and shizzz...

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.

{FriskxSans Oneshot} While spending time in the underground, Sans asks Frisk on a date.

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.

It's been many years since their failed first 'date' and Papyrus realizes that it isn't just his human friend who has been holding onto their love for him, but that he has fallen in love with them as well. Papyrus/Reader fluffy

Several weeks have passed since you fell into these labyrinthine subterranean caverns. It's time for you to move forward. [WARNING: Explicit Sans x Reader, the reader insert's sex is undefined and can be interpreted as either male or female.]

Spoiler alert for Season 5 - Episode 3 (The High Sparrow) - Sansa contemplates Littlefinger's imminent departure and her situation. Will probably be a one off...

Sansa misses her home...

She is not a little, lost creature anymore. And he likes it.

Life is not a song, Sansa has come to learn to her sorrow. It's not a fairytale, with handsome knights with flowers. Yet, one night, under the moonlight, Petyr's affections give her a fairytale. The night walked down the sky with the moon in her hand. - OneShot.

Some time after Taiga came back, and in one night, one couple in-love can at last show their feelings for good. RyuujixTaiga lemon! R&R! No flames pls! I hope its any good.

Lord Rathbone/OC. Lord Nelson Rathbone is a man on the verge of changing the course of British history, but will his past with a young woman who joins with his enemies to fight him prove to be his downfall?