Underswap Stories

CROSSMARE ♡ Nightmare meets his estranged brother, Dream, under a desolate tree which formerly held the very apples that split them apart. Little did he know that Dream had planned to take a bite out of the corrupted apple which would transform him into something Nightmare knows all too well. Nightmare slowly turns back into his passive self, though he desperately searches for a solution to both re-corrupt himself and save Dream from corruption- all whilst balancing his fragile love life. »»-----　♡　-----«« ╔═══════════════╗ Featured Ships: -> Cross x Nightmare [Crossmare] Ink x Error [Errorink] Dust x Blueberry [Dustberry] Killer x Dream [Kreme] Horror x Lust [Horrorlust] Fell x Classic [Kustard] ╚═══════════════╝

Being part of a group dedicated to helping protect AUs against harm can take a toll on someone, specially if that someone is insignificant to his teammates. The self deprecation, and self doubt, can make the worrier feel unuseful to his team. And with the importance of the job it could make this regular mortal long for their old, simple life. Will Swap overcome his uncertainty of being a star sans and continue to help save AUs from those who seek to cause harm to them? Or will he resign his position and go back to being the 'regular' sans in his AU? (Art by Jael Peñaloza (Jakeiartwork on YT)

your name is Y/N and you are a neko. you always had a human soul. you would curl your tail around your torso and have a hoodie with the hood up to cover your ( color ) ears. you ran away from home. your father was a neko and was taken away to be experimented on. your mother turned abusive when you were 13. you ran away and fell into the underground. you met the skeleton brothers and live with them. read this book to learn more! :3

𝐴 𝑏𝑙𝑖𝑛𝑑𝑖𝑛𝑔 𝑙𝑖𝑔ℎ𝑡 𝑤𝑎𝑠 𝑡ℎ𝑒 𝑙𝑎𝑠𝑡 𝑡ℎ𝑖𝑛𝑔 𝑦𝑜𝑢 𝑠𝑎𝑤 𝑡ℎ𝑎𝑡 𝑛𝑖𝑔ℎ𝑡 𝑎𝑛𝑑 𝑡ℎ𝑒𝑛 𝑑𝑎𝑟𝑘𝑛𝑒𝑠𝑠. 𝑊ℎ𝑎𝑡 ℎ𝑎𝑑 ℎ𝑎𝑝𝑝𝑒𝑛𝑒𝑑? 𝑊ℎ𝑒𝑟𝑒 𝑤𝑒𝑟𝑒 𝑦𝑜𝑢? 𝑊𝑎𝑠 **** 𝑜𝑘𝑎𝑦!? 𝐼- 𝐼 𝑐𝑎𝑛'𝑡 𝑆 𝐸 𝐸 𝑊ℎ𝑎𝑡 ℎ𝑎𝑝𝑝𝑒𝑛𝑒𝑑?.... 𝐼𝑡 𝑤𝑎𝑠 𝑐𝑜𝑙𝑑 𝐼.. 𝐼 𝑤𝑎𝑠 𝑪 𝑶 𝑳 𝑫 𝐼 𝑐𝑟𝑦, 𝐼 𝑝𝑙𝑒𝑎𝑑 𝑓𝑜𝑟 𝑚𝑒𝑟𝑐𝑦 𝑢𝑛ℎ𝑒𝑎𝑟𝑑 𝑏𝑦 𝑒𝑣𝑒𝑟𝑦𝑡ℎ𝑖𝑛𝑔 𝑎𝑛𝑑 𝑒𝑣𝑒𝑟𝑦𝑜𝑛𝑒.. 𝑤𝑒𝑙𝑙 𝑡ℎ𝑎𝑡'𝑠 𝑎 𝑙𝑖𝑒. 𝐈𝐭 𝐡𝐞𝐚𝐫𝐝 𝐡𝐢𝐦. 𝐈𝐭 𝐫𝐞𝐚𝐜𝐡𝐞𝐝. 𝑊𝑖𝑡ℎ 𝑎 𝑓𝑎𝑖𝑛𝑡 𝑏𝑟𝑒𝑎𝑡ℎ 𝑎𝑛𝑑 𝑑𝑎𝑟𝑘𝑛𝑒𝑠𝑠 𝑠𝑤𝑜𝑙𝑙𝑜𝑤𝑖𝑛𝑔 𝑚𝑒 𝑢𝑝 𝑎 𝑏𝑒𝑖𝑛𝑔 𝑎𝑛𝑠𝑤𝑒𝑟𝑒𝑑 𝑚𝑦-I̷t̷s̷ c̷o̷l̷d̷ i̷t̷s̷ c̷o̷l̷d̷ w̷h̷e̷r̷e̷ a̷m̷ I̷?- 𝑐𝑎𝑙𝑙, 𝑎 𝑏𝑒𝑖𝑛𝑔 𝑤ℎ𝑜 𝑤𝑎𝑠 𝑠𝑒𝑙𝑓𝑖𝑠ℎ 𝑏𝑢𝑡 𝑠𝑒𝑙𝑓𝑙𝑒𝑠𝑠 𝑎𝑡 𝑡ℎ𝑒 𝑠𝑎𝑚𝑒 𝑡𝑖𝑚𝑒. 𝐼𝑡 𝑯 𝑬 𝑨 𝑹 𝑫 𝑚𝑒. 𝐶𝑎𝑙𝑙𝑖𝑛𝑔 𝑜𝑢𝑡 𝑓𝑜𝑟 ℎ𝑒𝑙𝑝 𝑜𝑛𝑒 𝑙𝑎𝑠𝑡 𝑡𝑖𝑚𝑒.. . . . . 𝐈𝐭 𝐚𝐧𝐬𝐰𝐞𝐫𝐞𝐝. 𝓐𝓼 𝓱𝓪𝓹𝓹𝓲𝓷𝓮𝓼𝓼 𝓻𝓪𝓲𝓷𝓼 𝓪𝓷𝓭 𝓬𝓸𝓿𝓮𝓻𝓼 𝔂𝓸𝓾 𝔀𝓲𝓽𝓱 𝓱𝓮𝓪𝓽, 𝓽𝓱𝓮 𝓭𝓪𝓻𝓴𝓷𝓮𝓼𝓼 𝓹𝓻𝓮𝓿𝓪𝓲𝓵𝓼 𝓪𝓷𝓭 𝓬𝓸𝓸𝓵𝓼 𝓸𝓯𝓯 𝓽𝓱𝓮 𝓭𝓮𝓯𝓮𝓪𝓽.

I got tired of bad or short one shots and decided to take the writing into my own hands. Please suggest more ships at any point in my chapters. I want to write anything you want. This will also have a mix of fluff and smut in it, so there may be two chapters of one ship. Ship names will be at the beginning of chapters, as well as if the chapter is fluff or smut. >-< #35 Selfcest 13 June, 2022 #38 Selfcest 20 Oct, 2021 #67 Selfcest 5/3/2021

Chara, wanting to escape their old life, since no one really cared or took care of her, decided to leave her life in search of another. They approach a mountain well known as Mt. Ebott, and follow a luring voice that ended up in them falling in a huge crater. And into the world of monsters And Frisk, being awoken by a surge of determination in the underground, follows Chara around until making themselves known. They leave the ruins and come across a few skeletons... Sans and Papyrus (I don't really know what else to put... 😭)

Art cover and other art isn't mine! I'll be doing oneshots. I'll do anything but genderbend the Dreamrale twins #1 in Dreamberry on 9/10/25 #4 in Nightberry on 9/20/25 #5 in Sanscest on 9/18/25 #6 in Underswap on 7/12/25 #8 in Bluedreammare on 9/10/25 #9 in Dreamtale on 8/28/25 #11 in Nightmare on 9/10/25 #12 in Dream on 9/10/225

Why, Hello Human! This book used to be..not as great as it is now! It's been a while and I have finally finished my puzzles. There's no way you can get through them now! Mweheheh! Author: Heheh-Hey, Guys! This book was awful back then. Just forget about those awful chapters in the beginning. The chapters now have improved. I hope. But, yeah. I'm still finishing this unholy book. Welp, See ya!

No. Something's wrong. Why is Dream feeling and absorbing negativity? This is a Sans AU that I randomly came up with at 12am one night. Dream Sans is basically like Dust/Murder Sans, and teams with Nightmare against Ink 'cause Ink's being Ink. Yeah. That's...Really basically it. Enjoy! Or don't. Doesn't change my life. [ Cover Art does not belong to me!! ]

The tale of how Sans became who he is known as: From a human girl with a Nuetral Soul to a skeleton. But most importantly a big brother. Picture by: BonesTheSkelebunny01

A fox hybrid meets some skeletons and some fall for her, she meets Frisk again but something drastic happends to them, she ends up being distant once more. What will happen next?

Short story's and any type of requests for UNDERTALE AUS. Read first chapter for more information :3

Summaries... my worst nightmare... Anyways, the characters of this book are not mine, they are from their creators of Undertale, Underswap, Underfell, etc. etc. Ever since the Alternate Universes of Undertale found out about each other, they started to come together in one place that lets all monsters from all Universes in. Only a few do stay there. Cover Art was created by me, DO NOT USE IT FOR ANYTHING ELSE, thank you.

The Descent Begins YN LN, twenty years old and quietly unraveling, lives in the shadow of Mt. Ebott. A jagged peak that looms above the city like a forgotten god. Their days bleed into each other, marked by faded photographs, silent rooms, and a growing weight of solitude. On the morning everything changes, YN wakes to dust and ache, haunted by loss and memories that no longer feel like theirs. A package from a kind neighbor, a forced smile, a job stripped away without warning, small cracks in a day that already felt too fragile. They didn't know they would climb Mt. Ebott. They didn't plan to leave everything behind. And they didn't know the mountain would open up beneath them, pulling them into something ancient, strange, and irreversible. Beneath the surface lies a world of forgotten magic, fractured souls, and impossible beings-each encounter stitched with mystery, danger, and strange familiarity. Who will YN become in a world that reflects them like a mirror cracked down the middle? Who waits for them in the Underground? And can anyone-human or otherwise-truly escape what they carry with them? A fall begins the story. But the climb back out... will reshape everything. Read on, and descend.

Consider this up for grabs. It's got ideas, but I'm not up for writing it. - Cross + Blue + Dust + Horror friendship - OP Blue / Blue's insane, but only a little bit - Killer will make his appearance and join the fam - Originally from the small bits of a multiverse I had created for some of my Crossmas oneshots - General crack - Errormare? - Kingdom Hearts references... - Ink can get wrecked.

The creator no longer responded to the protector's calls, those colourful hues stopped dripping from the doodle-sphere. Without those hues, he couldn't feel anything. Unfortunately, the multiverse has become corrupted and has re-coded the AU's into constant reoccurring genocide routes that had left engraved scars on the monsters of those universes. With the Star Sanses' new disrupted coding, it's up to the (previously known) Bad Sanses to fix and save the multiverse. Killer, however had found his lost happiness with another skeleton from an endangered AU. A different type of happiness... But can Outer be saved from the destruction of his universe before it's too late? ❋*˚┉┉┉┉┉༝✧WARNING✧༝┉┉┉┉┉˚*❋ •Strong Language • Dark reoccuring themes ❋*˚┉┉┉┉┉༝✧Credits✧༝┉┉┉┉┉˚*❋ •Undertale- Toby Fox •Outertale- 2mi127/Mimi Pippinski •Killertale- Rahafwabas •Cover Art- LailaAngel ❋*˚┉┉┉┉┉✧┉┉┉┉┉˚*❋ •Started- June 9th 2021 •Finished- N/A •20 Chapters

Another comic book series to complement FutureVerse. This time we focus on Sam - Dust and Asy's daughter. Let's delve deep into her memories, relationships, and love struggles. Sam's story depicts the dilemmas of a teenage girl who is significantly different from the rest. Do you think there will be a typical script of this type? It's not for me to judge, but Sam and I will try to surprise you at every turn. And one thing I must admit, this little powerbomb is surprisingly good at it. (I apologize in advance for my bad English, but I'm from Poland and I just learning. -u-) Character creators: -Dust - Ask-DustTale -Swap!Sans - Undertale comunity -Asy - furgemancs -Sprinkle & Fury - 6agentgg9 -Blueprint - pepper-mint -Luxath - ??? -Desire - 6agentgg9 (?) -Orfeo - pepper-mint -Crescent - Lunnar-chan -Loki (Lucifer) - Insane-ej-blog -Killer - RahafWabas -Horror - Sour-Apple-Studios -Lust - NSFWShameCave -Sam & Wenus & Mars - my children

He couldn't help but feel for the longest time like something wasn't right. Like the person who was in charge of creating new worlds wasn't the right person. He couldn't help but feel like he was supposing to protect someone not there for some reason, as well as help them find something that was lost. What though? He wished he knew, He wished he could remember! An incident with the "destroyer of worlds" and later a "parasite" starts to bring back the truth though, and he hopes he can fix it before the current creator destroys everything.

blue and papyrus tried to start the portal again, getting sucked in. when blue lands on the other side of the portal, papyrus is now where to be found. blue soon gets found by horror, in one of his traps. im just weird these way

When you fell in love with the short, starry-eyed skeleton, you never realized just how far you would go for him. Through monsters, humans, resets, and genocide - you would go through the void and back to be with him. Your soulmate - Sans.