Underfell Sister Scenarios

How would your life be as Sans and Papyrus's sister in Underfell?

"A Match Made in Darkness" Nightmare Sans x Reader

Your life is mediocre, not horrible, but not great either. You yearn for love, but can't seem to find anyone. You own a blue/black heart necklace, not knowing it ties you to someone else... This is my first x-reader story, hope you enjoy!

One Day, I'll Save Myself- Reincarnated as Sans

You remember a life before war. A life lived in a body of flesh instead of porcelain bones. You look down at your little brother, little precious Papyrus, swaddled in green. You know then and there that in the first time since you were forcefully created and pulled into this strange vessel, there was something more pr...

Wait... I'm Nightmare!? I Thought I Died!?

(Cover made by me!) (!Updates 1-4 times a month¡) You died by cracking your skull open as you walked out of the shower. Godamnit life!!! To die in the most idiotic way!!! Which was very frustrating until you met a strange entity in the 'in between' that causes you to be reincarnated as Nightmare. Errr... sorta. What h...

The Faults in Our Souls ~ Gaster x Reader (Under editing)

"Do you not want to go back home? To the surface?" °°°°°°°°°°°°°°°° "No." °°°°°°°°°°°°°°°° "Why?" °°°°°°°°°°°°°°°° "Because my home is right here, sitting next to me." _______________________ You were used to the unfortunates of life. Everyone had them, it was normal, but life decided to take a lemon, freeze it, the...

Hell's Branch (Sans x Hybrid!Reader) DISCONTINUED

THIS STORY IS BEING CONTINUED ON @iliketrainskid86 ACCOUNT "You put on a fake smile to hide your pain. And you wish that someone would realize how broken you really are." Thousands of years ago humans and monsters ruled over earth. A war broke through and all the monsters were trapped Underground. Except for one (Mi...

Opposites attract (Werewolf! Sans X Neko! Reader

You find secrets, have embarrassing moments, and fall in love with a special skeleton who loves you back! Here's book two!! http://my.w.tt/UiNb/DiAp4D8loF

Goodnight, Kiddo... (Adopted by Sans! Reader Fanfic)

You are an orphan, abandoned by your parents at birth. You've lived between countless foster families and a dreaded girl's home for as long as you can remember, because nobody chose to adopt you. Now, you are fifteen years old, and you decide to run away. Monsters have been living on the surface come four years now...

Soulmates

Nightmare feels hopeless. His Soulmarks tell him that he's supposed to have four Soulmates, which is really peculiar in itself. But... Who would love a murderer like him? He's the personification of all negative emotions, of all evil. Who would be willing to love him...? And across the multiverse, four people ask them...

Song Of Love Or Death

Serin Sylvian is a hybrid of a siren and a skeleton monster. Kidnapped at a young age and experimented on, she goes through tons of hardships before she ended up sealed away in a cave alongside monsters. Now the barrier is broken with her free from her prison. Adopting a fake identity, she struggles to enjoy her free...

From The Depths of The Ocean Oceantale X Reader

The year is 18XX You are Lady (L/N) , tutor to a young girl named Frisk. What happens when you're on a ship with the young lass and a storm hits? Only time will tell....

Reincarnated as a Froggit/Authoritarian Tale - An Undertale Fanfic

Y/N, an undertale fan, dies while playing Undertale on their computer from electric shock after spilling their soda all over the computer.The fan then reincarnates as a Froggit in their favorite game, Undertale.

𝐔𝐧𝐭𝐫𝐮𝐬𝐭𝐰𝐨𝐫𝐭𝐡𝐲(Horror Sans x Reader)

​🇦​ ​🇳​​🇪​​🇼​ ​🇸​​🇴​​🇺​​🇱​ ​🇮​​🇳​ ​🇹​​🇭​​🇪​ ​🇺​​🇳​​🇩​​🇪​​🇷​​🇬​​🇷​​🇴​​🇺​​🇳​​🇩​...​🇴​​🇳​​🇪​ ​🇴​​🇫​ ​🇲​​🇮​​🇽​​🇪​​🇩​ ​🇹​​🇷​​🇦​​🇮​​🇹​​🇸​, ​🇳​​🇴​​🇹​ ​🇸​​🇪​​🇪​​🇳​ ​🇫​​🇴​​🇷​ ​🇦​ ​🇱​​🇴​​🇳​​🇬​ ​🇹​​🇮​​🇲​​🇪​. ​🇭​​🇴​​🇼​ ​🇼​​🇮​​🇱​​🇱​ ​🇹​​🇭​​🇮​​🇸​ ​🇯​​🇴​​🇺​​🇷​...

Our special hell ▸horrortale x reader◂

ᴱᵇᵒᵗᵗ ʷⁱˡˡ ᵉᵃᵗ ʸᵒᵘ, ᵇᵉʷᵃʳᵉ ᵗʰᵉ ᶜᵘʳˢᵉ! ᴹᵒⁿˢᵗᵉʳ ᵗᵉᵉᵗʰ ᵍᵒ ᶜˡᵃᶜᵏ, ᶜˡᵃᶜᵏ, ᶜˡᵃᶜᵏ... ᴵᶠ ʸᵒᵘ ᶜˡⁱᵐᵇ ᵗʰᵉ ᵐᵒᵘⁿᵗᵃⁱⁿ, ʸᵒᵘ ʷᵒⁿ'ᵗ ᶜᵒᵐᵉ ᵇᵃᶜᵏ! ᴴᵘᵐᵃⁿ ᶜʰⁱˡᵈ, ʰᵘᵐᵃⁿ ᶜʰⁱˡᵈ, ʷᵒⁿ'ᵗ ᵗᵘʳⁿ ᵃʳᵒᵘⁿᵈ. ᴴᵘᵐᵃⁿ ᶜʰⁱˡᵈ, ʰᵘᵐᵃⁿ ᶜʰⁱˡᵈ ⁻ ᵒᵒᵖˢ, ᵗʰᵉʸ ᶠᵉˡˡ ᵈᵒʷⁿ! ᴴᵘᵐᵃⁿ ᶜʰⁱˡᵈ, ʰᵘᵐᵃⁿ ᶜʰⁱˡᵈ, ˡᵒᵒᵏ ᵒᵘᵗ ᵇᵉˡᵒʷ... ᵈᵒʷⁿ ᵘⁿᵈᵉʳᵍʳᵒᵘⁿᵈ ʷʰᵉʳᵉ ᵗʰᵉ ᵐᵒⁿˢᵗᵉʳˢ ᵍᵒ. ◈⬖ ◈⬖ ◈⬖ ᴰᵉᵃᵗ...

Our special hell { horror sans x reader } discontinued

※ WARNING FOLLOWING CONTENT IN THIS STORY CONTAINS GORE, SEXUAL ABUSE/ SEXUAL S AND STRONG LANGUAGE (swear words) ※ 【Hunger. Hunger was the one problem the underground faced when they were banished underground forever, barely any food remaining monsters were forced to go back to the natural animalistic instinct. Kil...

A Horrific Tale || Reader Insert

In a timeline where Eliza had yet to fall, (Y/n) had fallen instead. This was the world of the 'Eat or be Eaten' and (Y/n) did not belong here. Definitely did not belong here. -.-.-.-.-.-.-.-.-.- The air was stale and thin. The slience burdened my soul. I trembled in the wind as I planted my back against th...

• 𝐂𝐮𝐫𝐢𝐨𝐬𝐢𝐭𝐲 ⋟ 𝘉𝘢𝘥 𝘚𝘢𝘯𝘴𝘦𝘴 𝘹 𝘙𝘦𝘢𝘥𝘦𝘳【✔】• DISCONTINUED

DISCONTINUED ‼️ (don't read if you don't like misgendering, bad storyline, dramas, mischaracterzation.) ⋙ ❝ "𝐓𝐡𝐞𝐫𝐞 𝐢𝐬 𝐧𝐨 𝐞𝐬𝐜𝐚𝐩𝐞, 𝐲𝐨𝐮'𝐫𝐞 𝐭𝐫𝐚𝐩 𝐰𝐢𝐭𝐡 𝐮𝐬 𝐢𝐧 𝐡𝐞𝐫𝐞.. 𝐂𝐮𝐫𝐢𝐨𝐬𝐢𝐭𝐲 𝐮𝐩𝐨𝐧 𝐲𝐨𝐮 𝐜𝐨𝐧𝐭𝐫𝐨𝐥𝐥𝐢𝐧𝐠 𝐮𝐬. ❞ 𝘉𝘢𝘥 𝘚𝘢𝘯𝘴𝘦𝘴 𝘹 𝘙𝘦𝘢𝘥𝘦𝘳 【✔】 - ☆ 𝘉𝘢𝘥...

¤ERROR: Love not Found¤

Fazbear wanted to seem as though they were great with treating their employees... but they had none! All they had were bots... and one worker named Vanessa... that's when they decided to do something. Something that might get people to work there. That was to make a humanoid animatronic. Y/N, their most human robot. I...

I was reacarnated as a Chara?

it's one of those reacarnated book this probably sucks cause time my first time doing this what's going to happen is going to be random shit from my brain Fgod belongs to harrisha 6 Art is not mine WHY ARE PEOPLE READING THIS IT IS BADLY MADE

PROJECT: Evil (Robotic!Bad Guys X Scientist!Reader)

(Girls Only!) (#ShoeTheTape) WARNING: Profanity and Violence ahead! - Every Volt Is Love - A young woman has been dreaming of becoming one of the greatest scientists in the world through her newest invention. That wish becomes a reality when she gets accepted in Star Industries, with the help of her robotic friend. Ho...

Mafiafell-Little Lady

(Description still in progress) -I am going to follow some of the original comics but I will change a few things here and there. Sans won't be as violent, to Y/n at least but will still seem like he is. Give it a read :)

Person of Interest

It was twelve AM on a friday night- or saturday morning. You'd just finished working a double at the bar; tired and achy as all hell, all you wanted was get home and get off your feet for the first time in fifteen damn hours. You were almost home, just one block off from your apartment; maybe if you'd left work just a...

Mafiafell sans x reader

y/n is just trying to help her dad in the city at his bar this is my first time writing a fanfic so I will be editing the story

Orange Smile

Next time I get reborn I want a human body. Not a giant orange fox.

The Frozen Past

What? No no no no, you know you did this horrible thing, even reading some stories of this type, but you didn't think it would become real. You only hope you survive this with your new brother. ... Now you wish you had created it nicer. And after all that shit? you get transported into the basement of alternate skelet...

Blood 'n Bones || Bad Sanses x Reader (DISCONTINUED)

You would assume Y/N is just a regular waitress, but is she really? Pfft nah, nobodys normal in this book! I mean I have you seen the title? its the bad guys for crying out loud!! who knows what random shit they're gonna get up to! are you interested yet? well why wouldn't you be?! Have a read for yourself and tell me...

Reborn as Classic Sans (But Different)

Chop chop

You and your best friend fell into a mountain only to discover hell. Monsters, hunger, starvation, blood lust... cruelty. You'd never have thought that a camping trip would lead your life onto a path that only horror movies could ever get close too. Your life should have ended, but he chose something different for you...

Memory Meltdown

"that skeleton" "Crooks?" "No, his brother" "You can't mean-" "Yes" He rubbed his chin curiously, looking back to his beloved machine... and the girl currently wrapped in it's cords. How would she react to him?

Soulbound || Sans x Reader

When a situation with a dying human ends up with you absorbing their soul, you panic (like any unprepared monster would). Suddenly Undyne is hunting you down, so you rope the mysterious skeleton next door into helping you. Which he does--in a very Sans way. And who knows? Maybe pretending to be his girl will pay off...