His Summoner || Demon! Nightmare Sans x Reader
  • Reads 79,642
  • Votes 2,910
  • Parts 74
  • Time 17h 8m
  • Reads 79,642
  • Votes 2,910
  • Parts 74
  • Time 17h 8m
Complete, First published Aug 15, 2023
Mature
When a demon summoning goes wrong, a rich and powerful man's son gets killed and (Y/n) is forced to team up with the Demon King that did it to survive the ensuing attempts on her and her family's lives. But the King will only do it on one condition: he gets her soul. So with no choice but to die for her mistake, His Summoner promises him her soul when the job is done. | 

- Demon! Nightmare Sans x Female Reader 
- A little bit of a reverse harem with plenty of Bad Sanses x Reader moments (with a canon reason for it :D), but ultimately, (Y/n) is Nightmare's 
- Honestly you could read this with no prior knowledge of any of the characters and you'd be just fine 
- Kinda a slow burn? But don't worry, I throw in so many subtle/not-so-subtle intimate moments with all the Sanses that it makes it worth the wait :D 
- I'll throw in some bonus chapters with the other Sanses for extra (non-canon) fluff that doubles as a breather from the story, too 
- Is the relationship toxic? Maybe. I mean, this is canon Nightmare after all. But that's the beauty of a fictional story, no? 
- A lot of the symbolism and hidden meanings aren't obvious, so you might have to be on the lookout to see them (and keep in mind: Night doesn't openly show many emotions, so the devil is in the details) 
- I'm not going to spoil anything, but for all you anxious readers out there like me, I'll divulge I'm a sucker for happy endings *wink* 
- It's my interpretation of the characters (kept as canon as possible)
All Rights Reserved
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The King's Queen (Nightmare Sans x Reader) by ReapingZen
40 parts Complete Mature
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Become Mine And Mine Alone by harrish6
5 parts Complete Mature
(REWRITE OF THIS BOOK IS UP! It is called "Obsessive Love".) (I do not own the cover, Undertale nor any of the characters besides my OC's, they belong to their respectful owner. For some reason, I just see Error in the front instead of passive Nightmare.) Error, Forced God of Destruction and Destroyer of Universes was largely unknown unlike Ink, the Creator and God of Creation. Their fights were unseen by the AU's, none of the Monsters knowing about the Destroyer as Ink doesn't want them scared and Error gave no shits if anyone knew him or not. But Error's job is a complicated one, one that he is forced into, and he has to get involved to destroy the worlds. He doesn't touch the Original AU's, but the copies that Ink makes have to go. It was only a matter of time before something happened. Ink, in a middle of one of their fights, blinded Error, hurting him much more badly then ever before. In panic, Error ported into one of the Original AU's. Ink, fearing what Error would do, tells Dream about the Destroyer. Now the hunt is on for the broken, blinded skeleton. Meanwhile a blinded Error has been taken under the wing of another powerful Monster who has fallen for the broken Destroyer at first sight. But sweet love is truly beyond him. It is a obsessive love, a unhealthy love unlike any other. Nightmare would do anything for Error, and would do anything to keep him by his side as he goes about taking over all the AU's. Now to convince Error that he should be his and his alone.
Forbidden [Nightmare!Sans x Reader] by sighnerd
52 parts Complete Mature
Warrior Cats x Undertale Multiverse Crossover ~~~~~~~~ Since the Multiverse was created, the Creators have been fighting over the AUs non-stop. It was a horrible, bloody war that lasted centuries. Many were killed and many were cast away as outsiders. One day, the Creators met in an AU called Dreamtale, and after another battle, the dead came down from the sky as spirits, and the fighting ceases. They told the Creators that were alive to unite, or they would die. So that's what the Creators did. They united. They- and their AUs inhabitants- created Clans. They all lived in Dreamtale, surrounding the Tree of Feelings. Generations passed and the Clans had never seen a war so horrible since the War of the Multiverse. They lived in an almost-harmony. Until Nightmare came along, that is. ~~~~~~~~ Hiya! It's me, Sighnerd. This idea came to me in a dream, so I'm making it a reality. I love Warrior Cats, and I love Undertale, and I tried once before to merge the two, only that didn't work because I wasn't as experienced in writing as I am now. You don't need to understand Warriors to read this! It'll all be explained. The only similarities are the fact that the Sanses (and some not-Sanses) live in Clans, follow the Warrior Code (which will be explained in the introduction), they aren't cats (that's just weird), they have the same roles (tweaked a little because they aren't cats), they follow the same customs, and some other small similarities. Kind of a slow burn. That's what I'm going for, anyway. There may be a few toxic moments, but it's Nightmare, so it's fine. Right? Art and characters (except for the Empathverse Sanses and Sigh) do not belong to me! Neither does Warrior Cats. Cover art belongs to ProductionRoxy. :D My interpretation of the characters, but I'm keeping it as canon as possible. They're tweaked a little to match the Warriors setting.
Bruised To The Bone: (Sans x Reader) by sweetisbored_
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(Y/N). A peculiar soul; A human core, with a skeleton's power. Her parents are ashamed of her, beating her every time they catch her using magic. One day, she accidentally hurts someone, and they bring her almost to the point of death, trapping her in her room. After the incident, time has begun to reset. Two months pass, and then it all starts over again. After two months, she's plunged into immediate pain and suffering. When she feels like she just can't take it anymore, she decides to take her own life as a sort of experiment. Y/N blasts through the wall, making her way to the chasm, where she hurls herself in.. And wakes up. Almost immediately, she's met with a threat, coming from a flower, no less. She deduces that this must be an evil sort of hell for people like her. People with magic. Her opinion is only further confirmed when she meets a skeleton who wants to kill her for existing. When Sans finds her, he's immediately confused. The absence of Frisk only adds to the confusion. Maybe this human can remember the resets. Maybe she hurt the kid because she wanted to be the most determined. Maybe this is the demon. Without fully understanding (Y/N)'s backstory, he goes after this anomaly in the timeline. He eventually decides that she isn't that bad after all; Just another depressed soul, not unlike himself. The two hit it off, their personalities obviously compatible. But what happens when one of them feels something more? And what happens when an old rival returns? HEADS UP: I really hate when, like, half the story or the whole sequel is full of pure fluff. Once (Y/N) and Sans get together, there will still be relationship drama and story drama and such. ALSO! This story is ongoing. It will have errors. Updates will occur every 2 days, and I won't edit them. Edit: OK. SO. The first few chapters are NOT a good representation of my skills. Once the story is done, I'll probably go back and edit, but for now just know that it gets better. I think.
< 𝐒𝐭𝐚𝐫𝚕𝚒𝚐𝚑𝚝 >  (Discontinued) by dream_syzygy
21 parts Complete
Two stories, brought together by twists, turns, and a mess of events. (Y/N), a kindly soul from Recoverytale, finds themselves assuming the role of hero, a role they never wanted. Although they are safe with Dream by their side, no one else is. And that simply isn't fair, is it? (N/N), a bold adventure seeker from Recoveryswap, is desperate to find the Nightmare they loved-desperate to save him from the Darkness. But of course, it's never easy to save someone that hardly wants to be saved. The two souls both long for it all to end peacefully. They both wish for their happy ending, but it'll take more than hopes and dreams to get it. Meanwhile, Nightmare is in a state of divided conflict. As he rebels against the Darkness, the Darkness fights back. Nightmare is just as desperate as (N/N)-if he doesn't stop himself, the Multiverse will be torn apart at his hands. Dream is trying desperately to both protect (Y/N) and save his brother. But there's no time to save both of them before the Multiverse collapses into chaos. As a war rages on between positivity and negativity, (Y/N) and (N/N) are forced to work together-but it's not only their lives at stake. It's the life of the Multiverse-and a fallen prince-that's on the line. And they're the only ones that can stop it. ---- (In order to understand anything that's going on, read Expiation and/or Divinity. Both can be found in my profile.) ---- [Dream and Nightmare belong to Jokublogs. The Sans' belong to their respective creators. I only own Recoveryswap and Recoverytale, and of course, this book series.] Book 3 of the Dreamtale Trilogy
Undertale: Soul String (Multiship) [DISCONTINUED!] by Virus_Night
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42 parts Complete Mature
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Depression... A Sansest Story. by Undercorn1
57 parts Complete Mature
Everything was running smoothly for the Star Sanses on this amazing day. Ink was drawing happily, Blue was running around chasing butterflies, and Dream was reading! Until we look a little... deeper. Dream was fine. But Ink was thinking about things much darker than his smile gave off. Blue, on the other hand, was thinking all happy thoughts! To an outsider. To anyone else, he would never have depression. To others, he was a cute little innocent boy. But only he knew the truth. Dream was the happiest out of the bunch. Not really surprised, are you? Let's check in on the 'villains' as you may call them. Dust and Cross were running from Killer, who was tightening his strings on his hoodie, NIghtmare was reading just like Dream, skimming over the page, Horror was playing with his ax, and Error was knitting. Who is depressed? Ha. You really are blind, dear, dear reader. Have you yet to notice that the strings were on Killers wrists, so they wouldn't show? Or the way Nightmare never turns a page in his book? Geno was running away from Reaper at that moment, who was laughing. Reaper was slightly sad because he had to reap some souls, but Geno was the one suffering. Fell was being beaten by his brother at that moment, and no one would save him... "You can't be saved without help." This involves Crossmare, Dustberry, Errink, Afterdeath, Kreme, and Scifell. No, I will not be using Horrorlust in this book because I just don't get the ship. Sorry Horrorlust shippers... I really got this whole sanscest thing from Bubblyship and __Purple_Fluffball__ so go check them out AFTER you read this. Please read... This is very depressing, as you can probably tell. 0-0
The Boy Who Doesn't Speak (Sans AUs) -- BEING REWRITTEN by SKSuperKitty
18 parts Complete Mature
For some reason, Ink, the Creator and Protector of the Sans AUs, has decided that some of the Sanses of the Multiverse should go to highschool again. Honestly, no one really liked the idea, especially the Bad Sanses, including Ink's enemy, Error. Prince Nightmare is one of the AUs that must repeat these years of treachery. He basically only finished his actual highschool, and is NOT looking forward to having to do it again. Luckily his brother, Prince Dream, will be coming along the journey beside him. But Nightmare and Dream Are polar opposites, so Nightmare can't really get along with his brother's friends, nor Dream get along with Nightmare's, if he had any. With rules to follow and secrets to keep, Nightmare must go through highschool and not let slip the terrible things that happen at home. But then suddenly the two princes disappear. There's no trace as to who might've taken them, either. The only one that doesn't seem concerned is their own father, the king. King Sun-Beam. What is he hiding underneath all of those jewels and fake smiles? A/N: There is lemon/smut. So all you innocent people out there-- don't worry! Because I warn you at every chapter, and right before it happens. I designed the cover, but did the not the amazing artwork of Nightmare Sans. So credit goes to that person for the art. :D Update!!!!: This story is being rewitten. I'm making another book that'll just be this one but a little different. Once that's posted, I'll make another "chapter" in this one, giving a link to the rewrite. Thank you to everyone who still reads or checks up on this book. &lt;3333
Expectations and a Golden Stitch-A DreamError/Insomnia Fanfic by HappyWriter62
50 parts Ongoing
Dream always felt the weight of expectations on his shoulders and they've only grown worse now that he's a Star Sans. Save this AU, rescue that person, stop Nightmare over there, and make X person smile! It's a never-ending cycle of tasks and he gets asked more about why he hasn't done it sooner or defeated his brother yet than thanked for what he accomplished. He feels trapped in this position and doubts if he didn't have his positive aura that anyone would care for him. Most like him for the joy he brings or what he can give them. Nobody around him ever feels genuine without a doubt in his head. Add in the stress of protecting one Star Sans(Swap) and keeping the other(Ink) from starting trouble and you have a positive guardian ready to break under expectations. Then you have Error, the destroyer of AUs. His reputation speaks for himself and builds all the expectations he needs whenever he steps foot into another AU. He's as bad an omen as a black cat crossing your path. Others assume he is bad because of his "freakish" or glitching appearance. He has accepted these but it gets tiring when he already has the voices bossing him around or Fate reminding him that he should do more destruction. But he doesn't limit himself to destruction. He watches UnderNovela, admires the stars, and appreciates what he can. He pushes the limits of what is expected of him or disregards them completely. A trait that Dream eventually finds himself admiring in him, the known enemy of his friend. He knows that Error's feelings are genuine since he doesn't change in his presence(still an angry manchild). So when Dream gets wounded and stuck with Error on a whim, where will it take them? Will it be a mistake remaining in a hatred of enemies or will it change them both for the better? Could this admiration open Error up to corrupting Dream or will he be the influence Dream needs to against expectations and live for himself?
-The Forest's Girl- by pastelmelonm
32 parts Complete
(Finished!) Anyways here's the plot (Grammar is also junky) This is a nightmare sans X Fem! Reader Just to clarify, I drew '(Y/n)' in the way I imagined her to sorta look like. She does not actually look like that it's just me. You're a girl (just roll with it) who is 22 years old and you have earthly powers, (more will be explained about the powers) Your father wanted a boy instead of you and he left your mother when you were born. Chasing after another woman your father was no where in sight. Your mom found out later that he was murdered by his new wife for his money and there your mother was left a widow to care for her only daughter. At 10 she died and instead of going to an orphanage, you took care and lived in your mothers small cabin deep in the forest with a small garden of course. You always heard of the guardians who guarded the tree of feelings and for the townspeople they always spoke harshly about the one they call Nightmare. Rather Dream, he was worshipped and praised for protecting good and positive feelings. And Nightmare protected the negative ones which of course they did not want. You on the other hand saw that without sadness and loss the world would be out of balance. So you always thought of Nightmare as misunderstood. And owning a small flower shop in the town you made two baskets full of sweets, flowers, and bread, thinking of how it would be a nice thank you gift for the two guardians who protected their respectable feelings. But what you didn't know was with that simple gesture of kindness, a certain skeleton became very interested in you. This book will have you wear dresses and nightmare will of course wear clothing suitable close to the Middle Ages, so basically it's kinda like back then. There are most likely going to be errors in the grammar so please excuse them (Artwork by me) I hope you enjoy this! (Also please keep in mind that I will most likely draw the outfits + maybe some parts of the book)
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Her Guardian || Demon! Dream Sans x Reader

62 parts Complete Mature

When a demon summoning goes wrong, a rich and powerful man's son gets killed and (Y/n) is forced to team up with the Demon King that did it to survive the ensuing attempts on her life. | Set in the same demonic skeleton universe as my demon Nightmare book with a different story, it's my take on the simple question: ''What if (Y/n) summoned Dream instead of Nightmare?'' | - Demon! Dream Sans x Female Reader - Alternate Timeline of ''His Summoner || Demon! Nightmare x Reader'' (but you don't need to read HS in order to understand Her Guardian!) - Dream has his own version of denial so it'll be a slow-ish burn again - Honestly you could read this with no prior knowledge of any of the characters and you'd be just fine - It'll be a reverse harem again (kinda), and I'll throw in some bonus chapters with the other Sanses for extra (non-canon) fluff that doubles as a breather from the story - Some characters get some much needed therapy (*cough* Dream) as well as more trauma✨(I don't eff around, and to prove it, characters will die) - A lot of the symbolism and hidden meanings aren't obvious, so you might have to be on the lookout to see them (though I think I was a little more blunt this time around?) - It's my interpretation of the characters (kept as canon as possible)