Kom's Nightmare Obsession
16 stories
Not all Nightmares are bad (Nightmare Sans X reader) by hunter3love
hunter3love
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(EDIT: STORY IS BEING REWRITTEN! PLEASE CONSIDER REREADING THE REWRITTEN CHAPTERS [chpts. 1-31] ON MY PG!) You are a young teenager girl. You have a happy normal life........kinda. You're best friends with the angel of monsters, Frisk. One day you follow her and sans to strange place on accident.You see lots of hers and hims. But one in particular caught your eye. BTW THIS IS A FUCKING SLOW BURN SO STOP WHINING! (Edit: I made this back when I didn't know what I was doing. So lots of the story is very confusing. I will be rewriting this through the summer. I'm sorry)
Stuck Together (Nightmare!Sans x Reader) by rainbowlixur
rainbowlixur
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(First wrote this on Quotev loll) Humans and Monsters. Most people despise monsters, but not you. In fact, you fell in love with one. A king. And a Human. Who knew that a monster made of negativity could feel love. Who knew a person could love someone like that. Who knew that you being a negativity battery, would lead to a love story. Who knew that *he* would fall for someone as simple as you. #3 in #nightmare - 5/23/22 #3 in #xsans - 5/23/22
Blind Love (Reader X Nightmare Sans) by YandereEmo
YandereEmo
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(Obsessed)Nightmare Sans x Blind Reader Trigger Warning! Abuse! For Mature Audiences ~~~ Y/n has known nothing but darkness her entire life. Blinded by the cruelty of her past, she navigates the world with cautious steps, haunted by the scars of her abusive upbringing. Yet, amidst the shadows that cloud her existence, she discovers a glimmer of hope in the form of a mysterious stranger who watches her from afar. Nightmare Sans is captivated by Y/N's ethereal beauty and resilient spirit. Obsessed with unravelling the mysteries shrouding her life, he becomes entangled in a dangerous game of cat and mouse, risking everything to protect the object of his affection. Wondering who exactly is in control, a lonely boy only desiring love, or a manipulative shadow? As their lives intertwine, Y/n and Nightmare find themselves drawn into a whirlwind of danger and desire, their fates bound by an invisible thread that defies logic and reason. But as secrets are revealed and dark truths come to light, they must confront their deepest fears and confront the shadows of their pasts.
Misery Loves Company  by Fanfic_yes
Fanfic_yes
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Previously titled 'One Heck Of A Nightmare' Reader becomes Nightmare Joku, right after he ate the apple... What now??? A/N: please comment, I'd like to read your opinions and know how you think I can make the story better or how I could've changed it Artwork for cover made by Inkami, not mine warning ⚠️ all rights reserved Undertale and AUs do not belong to me, except for like four that may be mentioned in this story CrossMare Kreme HorrorDust?? Gay??? Reader insert Yay
𝑩𝒚 𝑯𝒊𝒔 𝑺𝒊𝒅𝒆 ✧ 𝑵𝒊𝒈𝒉𝒕𝒎𝒂𝒓𝒆 𝑺𝒂𝒏𝒔 by chaesteria
chaesteria
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We saved each other. I saved him on the verge of dying, while... he saved me from loneliness. When I met him, I finally found my meaning, I found my happiness, and I found what I was missing. He gave me a purpose, and gave me my freedom. That's all that matters... My life was rather boring and dull. Being a princess wasn't so fun after all. I don't want the throne nor do I want to be powerful. I just wanted to live normally and be free! Free to make a decision of my own, free to choose what path I want, and free to love someone I desire. I knew life wouldn't be that easy on me. When I met a certain black skeleton laying on my garden... well maybe my life isn't so bad after all. [Be warned that the grammar is slightly shit since I'm too lazy to actually edit it. Written when I was 13 and it's kind of cringe... I don't ship any ship I mentioned here anymore, stop commenting about it. Well regardless, I hope you enjoy reading ^^] •art credit is @1530ry_3. You can find them on twitter! •highest rank #64 undertale <3
The Psychotic Parasite  by randomcringeperson
randomcringeperson
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So, I've been seeing a lot of reincarnated as nightmare or nightmare's parasite but they were all good even if they didn't care about killing someone if it could save someone they care about more, so that got me thinking... What if a person with no sense of empathy got reincarnated as nightmare's parasite? WARNING: VERY INCONSISTENT CHAPTER UPDATES. Feeling edgy, might update soon.
Reincarnated as nightmare sans from Dreamtale by nelliesheerin
nelliesheerin
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A women who loves children dies and is face to face with the decision to reincarnate as nightmare sans if she allows herself to be Karmas chosen child. 'Fgod error belongs to Harrish6'
An Interesting Reincarnation (Reader reborn as...) by AliceParadoxi
AliceParadoxi
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You wake up, finding yourself standing in a desolate grassy field, only the green grass had withered and died, leaving behind a dry, lifeless expanse. Above, the sky was a haunting shade of dark crimson, with a single crescent moon hanging in the air, its soft glow covered by the misty clouds. An overwhelming sense of pain consumed you...what happened here...? Let's rewind! You are Y/n, a human living on the surface, where monsters and the 'underground' don't and never existed. It was known as 'Undertale', a game made by game developer Toby Fox. You've played it before and loved it very much. The game became popular over time, and people started making alternate universes (au's) of the game such as Underswap, Underfell, Horrortale, Underverse, and many more. You had your favorites, mostly the more popular ones, and you knew the stories behind them. Little did you know that something unexpected would happen, changing your life forever. Cliché, I know :/ . .. ... .... This story has been inspired by some other reincarnation fanfics like "Misery Loves Company" by Fanfic_yes, "Reborn as Error" by Kiwi_Seal, and "Wait... I'm Nightmare!? I Thought I Died!?" by Donut2460. I encourage yall to check those ones out! They are great :DD | | | | (Cover art doesn't belong to me. I found it on Pinterest. I only edited it: https://www.pinterest.com/pin/10555380369605142/)
Given An Unwanted Second Chance by UndertaleFanatic981
UndertaleFanatic981
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(TW: unaliving thoughts and memories at the beginning. It gets better over time, don't worry! Trauma is difficult to overcome...) You didn't want a second chance. You didn't want to survive. You wanted the sweet release of death. But it seemed like the universe was far too cruel to allow you even that. It took away your memories, your free will to choose whether you live or die...hell, it took the one thing in life you owned! Your own name! And now it seemed like you had to live yet another cruel life, doing things you never wanted done to others. But...at least you could do things your way. Maybe this second chance wouldn't be so bad... (Reincarnated as Nightmare Sans, but unlike other stories, you have no clue what Undertale even is) (WE REACHED NUMBER 1 IN THE UNDERTALE TAG YOOOOOOOO) (9/13/25)