Undertale Au/Deltarune
16 stories
Living Bloody Characters (Classic x AU Sanses) by ysomnus
ysomnus
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[A story collab with LoloXtale!] Sans, an author, weaves oceans of horror within his books, immersing his readers in chilling tales. His narratives often delve into both realistic and imaginative realms of murder, an unexpected facet considering the gentle persona he portrays. Yet, as fate would have it, one fateful morning as he sipped his coffee and tuned into the morning news, a murder unfolded - mirroring a sinister description from his own work. A cryptic signature daubed upon the blood-stained wall sets him on a path entangled with those who've taken his words to disturbing extremes. Amid an unsettling obsession, mounting pressure to create, and a media maelstrom of falsehoods, the question arises: Can Sans break free from this infernal ordeal? As you start exploring the pages ahead, I want to let you know that the story will delve into some mature themes - things like gore, kidnapping, and other sensitive topics. I've included these elements thoughtfully, but whether you keep reading is entirely up to you. Stories can stir emotions and make us think, yet your comfort matters the most. Don't hesitate to take a break if the content ever feels too heavy. Just remember, your choice to engage with the material is personal, and I'm grateful for the considerate way you navigate these intricate layers of storytelling.
High School 'Classic' (Bad Sanses x Classic Sans)  by Sam_Is_Depressed
Sam_Is_Depressed
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Classic was just a normal skeleton who wanted to get by in school, but it hadn't been easy ever since his brother and dad died. He would often get in fights when someone would say something bad about his family and would often get into fights. He started a new year at AU high school, he didn't expect to stay there, but somethings have happened and he found himself staying there for the rest of his school life. ⚠️Warning⚠️ This is my AU This includes boy x boy This book includes some gore and smut Proceed with caution
An Unexpected Visit (Classic Sans x Aus) by LunLab
LunLab
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The cover art is mine but I used a base drawing. I'm also planning on changing the cover in the future Warning: My Omniverse. If you don't like Classic Sans x AUs, then leave and don't read it. This is probably cringey too. And this has LOTS of mistakes- The description will be in the Introduction so there will be no spoilers if you see this book description. Disclaimer: None of these characters are mine, except for some like my OCs and might possibly add more. All of these characters belong to their rightful owners. Undertale is by Toby Fox Started: November 10
Crazily In Love! (AU Sanses X Classic Sans) Under Editing by HetaliaxJapan09
HetaliaxJapan09
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Ink and the other sanses were just having their meeting when suddenly they were pulled in to a portal. When they woke up all of them were all tied up. They tried to use their powers but , it seems the one that captured them put magical hand-cuffes to block their magic. They looked around and saw a tall figure standing in the darkness. Who was the one thats standing in the dark? Who will save them? Where did they end up? Please read the story to answer these questions! The other sanses haven't met the original yet but they all heard of him. (Reminder: all of the sanses are in love with classic.)
Little sansy Nightmares by reapergodsans
reapergodsans
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Aren't very good, but some have feels? Sans keeps having nightmares and papyrus begs him to tell him whats going on Im doing this in different AU's now so yeahhhhhh Also AGAIN WARNING! THESE SUCK
Deltarune memes by uh-huh_yeah
uh-huh_yeah
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WeLl FlIp mY FLaPjAcKs ------------------------- HIGHEST RATING: #1 in Deltarune (I don't own these memes)
Reset {UNDERTALE} by emotistic-optimistic
emotistic-optimistic
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*FEATURED STORY* As Judge for King Asgore Dreemurr, Sans has seen a lot of strange stuff. But when he wakes up with the feeling that something is completely wrong, he decides it's time to investigate with the only monster who could know what was happening: Royal Scientist W.D. Gaster.
A Classic Nightmare by MoonQuibli
MoonQuibli
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Description: Classic finds himself in what he thinks is an AU. After fending some bullies away from a cute purple skeleton, classic comes back more and more, getting closer to nightmare. One day, classic arrives to find the AU desolate, with nightmare nowhere to be found. Years later, the Star Sanses begin a quest to find the original sans... but of course Nightmare has been looking for classic the whole time. Who will find him first? Will classic still recognize nightmare? It has a slow start, but it gets juicy pretty quickly. Lots of fluff, some angst, and a little bit of yandere nightmare! Yes. I know. It's a weird ship, but I just had an amazing story idea that I started obsessively planning out and I just needed to write it down. I don't really expect anyone to read this, but it's a good story, I promise. I do not own the characters, only the plot of this story.
Secrets (a sanscest story) by blu_berry_pie
blu_berry_pie
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A group of skeletons visit an abandoned castle that used to belong to royalty many years ago, with the hope that they'll find their missing friend, but in this castle they'll encounter twists and turns, secrets will be revealed and most importantly... ...they will not be alone Disclaimer: in this story they do not have any magic abilities.
Kustard by Kustard_ShipIt
Kustard_ShipIt
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When Classic is asked who he is by red sans he starts wondering who he is and who he wants to be. Classic Sans and Red Sans are very different and yet so alike. They feel the need to protect each other and be with each other at all times. Perhaps this could mean they were meant for each other?