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Hearts Broken and Words Unspoken by
White Cosmos reviews
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)
Undertale - Rated: M - English - Drama/Romance - Chapters: 39 - Words: 190,363 - Reviews: 87 - Favs: 171 - Follows: 194 - Updated: 9/5 - Published: 5/20/2016 - [OC, Sans] Frisk, Undyne
Broken Reflections by
Jonathan Anubian reviews
During the usual nightmare Sans finds himself staring at a strange reflection of himself. But something is wrong. When he finally wakes he isn't surprised to find Papyrus in his room, staring down at him. But he is surprised by the changes in his brother since he'd fallen asleep. Who is this evil imposter, and why doesn't his magic work anymore? An Undertale meets Underfell story.
Undertale - Rated: M - English - Angst/Hurt/Comfort - Chapters: 16 - Words: 43,755 - Reviews: 49 - Favs: 95 - Follows: 113 - Updated: 8/27 - Published: 1/11/2016 - Papyrus, Sans
Avoiding the Cracks (Sans x Reader) by
Zeyda reviews
It's been less than a year since monsters came to the surface. Reader is a college student, living in the city right outside Mt. Ebott. She is working under a school psychologist at Ebott Elementary - The only school in the world that teaches mostly monster children. She makes a lot of new friends, including a punny little skeleton that she falls hopelessly in love with.
Undertale - Rated: M - English - Romance/Drama - Chapters: 19 - Words: 45,949 - Reviews: 45 - Favs: 88 - Follows: 104 - Updated: 12/5/2018 - Published: 8/3/2016 - [OC, Sans] Papyrus, Undyne
Break me by
Trinity Stark reviews
Undertale AU Underfell, This Story contains scenes of intense soul groping and seduction view at your own risk? When something is broken it's easy to meld it to something else. In the end it begs the question what will it be melded to?
Undertale - Rated: M - English - Hurt/Comfort/Romance - Chapters: 9 - Words: 42,443 - Reviews: 10 - Favs: 30 - Follows: 22 - Updated: 10/29/2017 - Published: 3/12/2016 - OC, Sans
Muffets' Little Stress Reliever Project by
GarciaTheCommander reviews
Muffet hoped that her bake sale will increase money for the fundraiser to aid the spiders trapped in the ruins. But when a particularly creature comes in and doesn't buy anything, she thinks of another way he can pay up. That's when a sadistic thought creeps up in her head. Contains fetish material such as (Bondage/Reverse Rape/Sadistic/Monster/Femdom)
Undertale - Rated: M - English - Parody/Romance - Chapters: 9 - Words: 23,267 - Reviews: 135 - Favs: 112 - Follows: 131 - Updated: 6/20/2017 - Published: 1/9/2016 - OC, Undyne, Muffet
Bone-afied Security Guards by
Zecon19 reviews
summery: Frisk is the monster ambassador and is in need of protection. With the constant threat of human assassins, mobs, and the organization known only as the 'Priests of Purity', she will need the best. With the aid of the Skeleton brothers and her natural psychic abilities, everything should be fine. Right? ( Sans x Frisk, Papyrus x Frisk,)
Undertale - Rated: M - English - Hurt/Comfort/Romance - Chapters: 43 - Words: 282,180 - Reviews: 261 - Favs: 198 - Follows: 162 - Updated: 6/13/2017 - Published: 4/22/2016 - Frisk, Papyrus, Sans - Complete
Succubus by
Myshu reviews
A succubus lands in the underground. If she wants to get out, she's going to have to make a bad deal. ...and possibly break every rule she has.
Undertale - Rated: M - English - Chapters: 30 - Words: 112,710 - Reviews: 61 - Favs: 33 - Follows: 39 - Updated: 11/1/2016 - Published: 2/18/2016
I'll Make You Love Me by
skelegirl2 reviews
I don't know what to call this. It was a requested one shot but will be continued. Oh, and um, it's pretty suggestive so be warned. Plot: sans is tired of killing you over and over, so he's decided he's going to capture your soul in a different way. He's going to make you fall in love with him. (Underfell)
Undertale - Rated: M - English - Angst/Romance - Chapters: 14 - Words: 20,239 - Reviews: 113 - Favs: 138 - Follows: 156 - Updated: 10/12/2016 - Published: 2/3/2016 - Sans
In the Shadows by
Ravlia reviews
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)
Undertale - Rated: M - English - Romance/Friendship - Chapters: 14 - Words: 58,397 - Reviews: 94 - Favs: 216 - Follows: 177 - Updated: 8/30/2016 - Published: 12/28/2015 - [OC, Sans] Frisk, Papyrus - Complete
Night Walks by
idkwhatimwriting reviews
Reader is forced to prostitute themselves everyday. In a turn of events, Mettaton saves you and takes you to stay in the most notorious mafia leader's house until he returns. You soon meet the monster everyone's talking about: Sans. But will this be the chance to turn your life around or will you be thrown into prostitution again? Reader x MafiaTale Sans, Slowburn
Undertale - Rated: M - English - Angst/Romance - Chapters: 8 - Words: 14,293 - Reviews: 15 - Favs: 32 - Follows: 43 - Updated: 8/20/2016 - Published: 8/14/2016 - [Sans, OC] Papyrus, Mettaton
Frisky and Bonely by
D2DM-FanFic reviews
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.
Undertale - Rated: M - English - Romance/Humor - Chapters: 18 - Words: 36,447 - Reviews: 66 - Favs: 100 - Follows: 116 - Updated: 8/14/2016 - Published: 12/7/2015
Upperworld Ties by
Sedated-Smiles reviews
Ever since the Barrier broke, your life had changed for the better. From meeting your best friends to adopting a Monster child, your life couldn't be better. That is, until you meet two unusual skelly bros ... (Rated M for future chapters)
Undertale - Rated: M - English - Romance/Family - Chapters: 5 - Words: 11,184 - Reviews: 2 - Favs: 11 - Follows: 12 - Published: 8/5/2016 - Sans, Toriel, Alphys, Burgerpants
Your Sans by
QClueingForLooksQ reviews
Just read the first paragraph.
Undertale - Rated: M - English - Romance/Hurt/Comfort - Chapters: 2 - Words: 2,301 - Reviews: 2 - Favs: 4 - Follows: 3 - Published: 7/25/2016 - Papyrus, Sans
Sin collection by
Trinity Stark reviews
The beginnings of smut.. Pure smut..Sin galore... Gaster Sans is owned by Borurou I'm just borrowing him... I'll put him back when I'm done.. - -; Don't hate me.. Smut practicing more then anything.
Undertale - Rated: M - English - Chapters: 3 - Words: 12,129 - Reviews: 1 - Favs: 9 - Follows: 12 - Updated: 6/28/2016 - Published: 4/30/2016 - OC, Sans
Hot - headed capitulation by
guren666 reviews
Something was way off. This bed was too soft to be his, Sans thought, half sleepy. And his bed wasn't so big either. Then the events from yesterday came back to him and he blushed deep red, burying head in hands.… This is Grillby's room... Sequel to Echo Flower for my peeps who can't get enough of UF! Sansby fluff. This one is for you.
Undertale - Rated: M - English - Romance/Hurt/Comfort - Chapters: 1 - Words: 2,190 - Reviews: 4 - Favs: 49 - Follows: 12 - Published: 6/23/2016 - [Grillby, Sans] Papyrus - Complete
Forget Me When I'm Gone by
Baka-Kakarott reviews
(OC x Sans) other pairings. Izzy just wanted to draw with her friend by Mt. Ebott's famous gaping hole, when she and her best friend were shoved into the hole. Unimaginable grief and suicide take over her soul. Can she be saved? Rated M for later. Suicidal, Gore, Death, SEX, fluff, MUCH SWEARING, FUNNY LAUGH! -Frisk lives there, no freedom was granted... OR 3:)-
Undertale - Rated: M - English - Tragedy/Romance - Chapters: 2 - Words: 4,544 - Reviews: 2 - Favs: 7 - Follows: 6 - Updated: 6/20/2016 - Published: 6/19/2016 - OC, Sans, Toriel
My tales in Undertale (Original on DeviantART) by
Amina Tolbe
Toriel has a daughter, but she's adopted. Many years ago a wolf child came to Underground looking for her parents, she was descended herself but no one was to care for her, Toriel comes to aid and helps her learn and grow, especially with the troubles of her new home. Being that certain skeletons loved to make a mess of things. (I had an account here but I lost it years ago.)
Undertale - Rated: M - English - Humor/Adventure - Chapters: 14 - Words: 16,331 - Favs: 4 - Follows: 2 - Published: 6/19/2016 - OC - Complete
Throw Me a Bone by
Flurrious reviews
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!
Undertale - Rated: M - English - Romance/Hurt/Comfort - Chapters: 16 - Words: 31,028 - Reviews: 45 - Favs: 111 - Follows: 141 - Updated: 6/14/2016 - Published: 1/13/2016 - [OC, Sans] [Undyne, Alphys]
The Good in the Bad by
davis.riell reviews
This is it, your boyfriend finally crossed a line and really hurt you. You cant think about that now though, you're running to Mt. Ebott, in the hopes that by some slim chance, the rumors are real and you can finally disappear for good. Little do you know who and what's waiting on the other side. Sans/Reader
Undertale - Rated: M - English - Romance/Adventure - Chapters: 10 - Words: 5,870 - Reviews: 1 - Favs: 15 - Follows: 17 - Updated: 6/10/2016 - Published: 5/22/2016 - Frisk, Papyrus, Sans
Cry Wolf by
The Raven At Her Writing Desk reviews
A former human turned monster is forced to flee into Mt. Ebott after being bitten by a feral werewolf. In her panic, she falls down a hole and is knocked unconscious. When she wakes, her shoulder is in severe pain and her memory is foggy. She doesn't know it yet, but her whole world is about to be flipped upside down.
Undertale - Rated: M - English - Adventure/Fantasy - Chapters: 11 - Words: 27,999 - Reviews: 47 - Favs: 55 - Follows: 82 - Updated: 6/9/2016 - Published: 12/14/2015 - OC, Papyrus, Sans, Undyne
I'm Still Here by
20DruidicKats reviews
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.
Undertale - Rated: M - English - Hurt/Comfort/Friendship - Chapters: 7 - Words: 30,427 - Reviews: 6 - Favs: 14 - Follows: 19 - Updated: 5/28/2016 - Published: 1/16/2016 - OC, Papyrus, Sans, Toriel
Movie Night by
TigerLilyBulb reviews
You have barely hit play on the movie before Sans is already making it difficult for you to concentrate. Hopefully you have the self control to not jump his bones in front of everyone. SansxReader one-shot.
Undertale - Rated: M - English - Romance/Drama - Chapters: 2 - Words: 5,157 - Reviews: 9 - Favs: 63 - Follows: 22 - Updated: 5/23/2016 - Published: 1/24/2016 - Sans - Complete
In Heat by
fictionmeister reviews
sans is in heat. That's it, there's no plot, it's just good ol' skele-sin, and reader gets caught in it this is a reader insert with female parts, fair warning
Undertale - Rated: M - English - Romance - Chapters: 2 - Words: 1,907 - Reviews: 15 - Favs: 20 - Follows: 12 - Published: 5/23/2016
A New World by
Rin777Radon reviews
OC X Sans OC runs away from home to get away from abusive home. She ends up falling into the mountain and ending up in the Underground. She comes across monsters and two skeletons especially one which she fancies.
Undertale - Rated: M - English - Romance/Adventure - Chapters: 5 - Words: 17,739 - Reviews: 2 - Favs: 12 - Follows: 7 - Updated: 5/18/2016 - Published: 4/8/2016
Lil Butterfly by
reinwolf reviews
Monsters were abel to integrate them self in the normal live routin from the humans but the monsterhater start attacking monsters and try to make themself to victims.You are a soul-judge who is able to use magic and summon the souls and judge them.What if you have to judge the soul of an cinnemon roll from skelleton and your brother is the friend of ther brother?(Sans/Reader)
Undertale - Rated: M - English - Hurt/Comfort - Chapters: 3 - Words: 9,132 - Reviews: 3 - Favs: 4 - Follows: 3 - Updated: 5/11/2016 - Published: 4/22/2016 - [OC, Sans]
Mid-Spring (Sans x Reader) by
nmps reviews
Monsters have just appeared two years ago and nothing has changed much besides getting to know new faces, like a certain skeleton perhaps? New coworkers in the dead of night, it all starts Mid-Spring. *Updates are faster on my wattpad, along with the art work for this story. Read here on Wattpad: /story/69822130
Undertale - Rated: M - English - Romance/Hurt/Comfort - Chapters: 7 - Words: 10,137 - Reviews: 9 - Favs: 9 - Follows: 15 - Updated: 5/7/2016 - Published: 4/25/2016 - Papyrus, Sans
Skeletons are single because they have no body by
LovelyLovelessInDenial reviews
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
Undertale - Rated: M - English - Romance/Hurt/Comfort - Chapters: 5 - Words: 15,627 - Reviews: 51 - Favs: 153 - Follows: 198 - Updated: 5/3/2016 - Published: 12/22/2015 - [Frisk, Sans]