21 - 40 of 398 Bookmarked Items in Alternate Universe - Underlust (Undertale)
Navigation
List of Bookmarks
-
Tags
Summary
You were a normal human. You went to college, you had a life, friends, family, etc. Apparently, the void didn’t care much for happy endings, and you find yourself strapped to a table in an underground lab.
It’s fine, you have plot armor.
———————————
Or, you get sucked into the void and your soul is placed in the body of eight-year-old Sans.
Arc 1: Heritage (1-7)
Arc 2: Hell (8-10)
Arc 3: Home (11-45)
Arc 4: Heart (46-59)
Arc 5: Hostage (60-?)Series
- Part 1 of How To Be A Human Being
- Part 1 of Hounds Of Love
- Part 1 of I/Me/Myself
- Language:
- English
- Words:
- 226,769
- Chapters:
- 75/?
- Collections:
- 6
- Comments:
- 2,084
- Kudos:
- 1,685
- Bookmarks:
- 333
- Hits:
- 56,163
-
Bookmark Notes:
Chapter 57
-
Bookmark Tags:
Bookmark Notes:
75
-
Bookmark Collections:
Bookmark Notes:
9
-
CrushingOn Stupid One-Shots by CrushingOnSans (CrushingOnRazz)
Fandoms: Undertale (Video Game)
20 Oct 2022
Tags
Summary
Alright so this is just a ton of bullshit, welcome. One-shots, lots of one-shots. Also lots of procrastination. It's great, you'll love it, I promise. If you look closely you can see exactly when my OTP changes (I'll give you a hint it happened twice)
Feat. Dumb Titles (hell yeah)
Series
- Part 1 of COSOS Stuff
- Language:
- English
- Words:
- 311,341
- Chapters:
- 142/142
- Comments:
- 3,991
- Kudos:
- 1,197
- Bookmarks:
- 81
- Hits:
- 47,696
-
The borderline between the magic larynx, reality, and chocolate molten lava cake by KennieMorguen
Fandoms: Undertale (Video Game)
17 Mar 2025
Tags
Summary
Lust is an outcast, ostracized by most outside of his AU with very few exceptions, and even those exceptions were those that Lust never really considered close.
One day he gets an invitation to a party, curtesy of Blue, so of course Lust makes his appearance. At the party, Lust finds none other than Red, a monster that though he finds him attractive, the Fell monster was a constant bully and instigator in his life since venturing out into the multiverse. Why Red does this to him? He'll have to learn the hard way, via an unplanned game of 7 minutes in heaven.
Except it's not 7 minutes, and there was no bottle or pulling names out of a hat.
-
Bookmark Tags:
Bookmark Notes:
The borderline between the magic larynx, reality, and chocolate molten lava cake by KennieMorguen
Summary:
Lust is an outcast, ostracized by most monsters outside of his AU with very few exceptions, and even those exceptions were those that Lust never really considered his friends. One day he gets an invitation to a party, curtesy of Blue, so of course Lust makes his appearance.At the party, Lust finds none other than Red, a monster that though he finds him attractive, the Fell monster was a constant bully and instigator in his life since venturing out into the multiverse. Why Red does this to him? He'll have to learn the hard way.
-
Bookmark Notes:
lust needs friends- any friends! also ice.
red is an asshole, but he gets around to being the friend in the end.
universal cultural differences abound.
-
Tags
Summary
Life was never very kind to you, but you never really knew any other way. You just tried to stay as quiet as possible and out of the way. You thought you were being good, you thought your parents loved you.
But you soon find out they don't, and their final betrayal changes your life completely.-
Bookmark Collections:
-
Tags
Summary
What if the major AUs existed in the same world as Undertale?
How would the different Monster Kingdoms interact?
How would they be related?https://nekochan4eva.tumblr.com/post/660193462078095360/hi-im-currently-working-on-an-undertale
Series
- Part 1 of Garden of Hopes & Dreams
-
Bookmark Tags:
-
Bookmark Tags:
Bookmark Notes:
Se ve que sera buena historia
Volver a leer cuando sea escrita
El multiverso va a convivir
-
Tags
-
Bookmark Notes:
:)
-
Summary
After a forced extended break from writing (crazy how like a week is considered an extended break to me rn 💀), I found myself having a hard time getting back into the rhythm of things; I've also come to take more notice into how I struggle to write flash fiction.
So, I decided to take a crack at the solution by writing flash fics to revive my pace! And what better way to show my appreciation to some frequent commentors than to gift them?
Probably will end up being a reoccurrence if I find myself slumping, so lets see how far it goes! :)
- Words:
- 49,706
- Works:
- 12
- Bookmarks:
- 17
-
Bookmark Tags:
-
Bookmark Tags:
Bookmark Collections:
-
Five Times Papyrus Had a Multiversal Guest and One Time He Visited Them Instead by Stellocchia
Fandoms: UTMV, Undertale (Video Game)
03 Oct 2024
Tags
Summary
When Sans disappeared rumor had it that he’d jumped into the Core just like his dad had.
Papyrus heard the gossip. Even living in a relatively big city like New Home it was impossible to avoid. Sans was well known everywhere in the underground. He worked a bit here and there for multiple people. And he’d been made long ago into the right hand of the King.
He didn’t believe it though. He had figured that, eventually, Sans would contact him again and clear everything up. And then they could put that misunderstanding behind them and laugh about it over a hearty home-cooked meal.
He definitely didn’t expect Sans to just step into his living room from a big black swirling portal a couple of weeks after he’d disappeared like nothing ever happened. But he did. And he was carrying a heavy box full of soul balm and was being followed by a shorter and more shoddily-dressed copy of him with dark goop falling from his eyes and a worryingly exposed soul.
-
Or Underlust Sans joins Nightmare's gang and leaves his Papyrus to collect brothers like pokemon
-
This is a prequel to The Light Side of the Moon, but can be read completely independently.
Series
- Part 3 of October 2024 Fic Marathon
- Part 2 of The Light Side of the Moon Multiverse Collection
-
Bookmark Notes:
Finished reading 🥰
-
Bookmark Tags:
Bookmark Notes:
Five Times Papyrus Had a Multiversal Guest and One Time He Visited Them Instead by Stellocchia
Summary:
When Sans disappeared rumor had it that he’d jumped into the Core just like his dad had.Papyrus heard the gossip. Even living in a relatively big city like New Home it was impossible to avoid. Sans was well known everywhere in the underground. He worked a bit here and there for multiple people. And he’d been made long ago into the right hand of the King.
He didn’t believe it though. He had figured that, eventually, Sans would contact him again and clear everything up. And then they could put that misunderstanding behind them and laugh about it over a hearty home-cooked meal.
He definitely didn’t expect Sans to just step into his living room from a big black swirling portal a couple of weeks after he’d disappeared like nothing ever happened. But he did. And he was carrying a heavy box full of soul balm and was being followed by a shorter and more shoddily-dressed copy of him with dark goop falling from his eyes and a worryingly exposed soul.
-
Or Underlust Sans joins Nightmare's gang and leaves his Papyrus to collect brothers like pokemon
-
This is a prequel to The Light Side of the Moon, but can be read completely independently.
-
Tags
Summary
You were finally getting your life back on track. Juggling college courses and a new job, you were slowly but surely rebuilding from the ground up, convinced the worst was behind you. That all changes when a magical summons you can't refuse rips you from your world and drops you into a house filled with powerful, skeletal monsters who despise you before you’ve even said a word.
To them, you are the arrogant and careless human who shattered the soul of their dearest friend, the gentle mage Lyra. They see you not as a person, but as a living tool—a magical "key" they require to heal the damage you supposedly caused. Trapped in a multiversal nexus with no way home, you must navigate a gauntlet of relentless animosity and suspicion.
Every word you say is twisted, every action is judged through the lens of lies you don't even know have been told. How can you survive in a home that isn't a home, surrounded by enemies who believe they are the heroes? And how can you prove your innocence when the true manipulator is the very person they've sworn to protect?
-
Tags
Summary
Lust has to navigate his romantic feelings that he never had the chance to act upon in his own universe where it had become taboo and discouraged. Living in a household full of attractive polyamorous guys presents him with the ultimate opportunity to give love a try, but once they begin to approach him with hopes of something more than friendship or a lay, he finds himself overwhelmed with decisions and the struggles that come with dating as a mentally ill person, dating other mentally ill people. Is Lust biting off more than he can chew, or will he find the love and comfort he always needed in this ragtag gang of misfits?
-
Bookmark Tags:
Bookmark Notes:
- Left on Chapter 8 -
Summary:
A Valentine's Day series, but so much more.Lust has to navigate his romantic feelings that he never had the chance to act upon in his own universe where it had become taboo and discouraged. Living in a household full of attractive polyamorous guys presents him with the ultimate opportunity to give love a try, but once they start coming to him, he finds himself overwhelmed with decisions and the struggles that come with dating as a mentally ill person, dating other mentally ill people. Is Lust biting off more than he can chew, or will he find the comfort he always needed in this ragtag gang of misfits?
-
- Words:
- 8,439
- Works:
- 2
- Bookmarks:
- 6
-
Bookmark Tags:
-
Tags
Summary
Your life was perfect. You grew up in a happy home, were a good student, had two best friends, and fell in love. But when one of your best friends dropped you, it all went downhill. You moved to a new town after dealing with a bunch of drama and you run into your ex-best friend.
She's happy. And in love. And her boyfriends dislike you for some reason?
You try becoming her friend again. And it's slowly working, but what do you do when she tells you a secret that could literally put innocent people in harm's way?
ON HIATUS INDEFINITELY.
-
Tags
Summary
The Serif household has been through many odd scenarios. After all, they are entirely comprised of other versions of the same two skeletons who got stuck in the world they have called home for six years, unable to return to their worlds and thus forced to carve out a life for themselves until further notice. All things considered, they found their stride and adapted to the ongoing weirdness of universe hopping.
That is, until she arrived. Flora, a woman so out of left field and disrupting their normality, appeared in the basement, battered and bloodied to hell and back. Stuck like all the others who had appeared before her, the Serif household is forced to accommodate her until she stabilizes, slowly beginning to get to know the lackluster and stone-faced woman who ensures they don't injure themselves via stupid means.
Few expect her to open up. Fewer expect her to accept becoming friends.
None expect for any of them to become much, much more.
-
Tags
Summary
After forty years living in the same small town, it's time for you to move on to a new place. You pack all your essentials and head for a new place to live: Ebbott. There you find the one thing you've been denying yourself ever since you lost your family centuries ago. Can you let these skeletons in and know your deepest secret?
-
Bookmark Collections:
-
Bookmark Notes:
Ch1
-
-
Tags
Summary
You needed a new life for yourself.
So you move away from home and try your hand at a new city. Armed only with your things you brought and your partner in crime, Sheriff, your German Shepard.
You move into a new city full of monsters.
So what happens when you meet and connect with skeletons around town?
Well, guess you just gotta stick around to find out.
-
Bookmark Collections:
-
Bookmark Collections:
-
Tags
Summary
Deep into the city Ebott, just past the entrance trails to the mountain, there is an abandoned house. Though, is it abandon, or just gave up on?
Most locals of Ebott know of the three-story home with a beautiful Victorian build. The gardens that seem to remain in a constant state of perfection, the vines that creep up walls and through the one broken window out front- said to have been broken during what led to the haunting… Ebott’s very own haunted house.
That’s where you come in, SPIRIT, you are the haunter of Ebott’s spooky stories and the original crypted before monsters broke to the surface.
( based of my {monster?} sona, spirit. but this is an /reader. you don't remember your name or life, so you are just called Spirit. )
Series
- Part 2 of Skele-harem shenanigans
-
Bookmark Notes:
Chapter 13
-
Tags
Summary
*With each RESET, you find yourself in a different AU.
You made a mistake--a selfish, terrible mistake--and broke your promise. Unfortunately, that's not all you broke. With your RESET button shattered, you traverse the timelines, trying to find a way back to your friends to make things right. But with the skeleton(s) you can't seem to resist popping up in new form with each RESET, when all is said and done... will you even want to go back?
- Language:
- English
- Words:
- 133,152
- Chapters:
- 17/17
- Comments:
- 812
- Kudos:
- 2,377
- Bookmarks:
- 403
- Hits:
- 52,024
-
Bookmark Collections:
-
Bookmark Notes:
Read soon
-
Bookmarked by KZD Kojitative Zoa Deliberates (KZD_Kojitative_Zoa_Deliberates)
13 Aug 2025
-
Ink Sans And His Multiverse Full Of Idiots by ZsFuture60111
Fandom: Undertale (Video Game)
31 Jan 2025
- Words:
- 71,996
- Works:
- 10
- Bookmarks:
- 15
-
Tags
Summary
Mercury just wants life to go back to what it was a month ago. Working at a job he absolutely loves, going to the bar with his friends, and enjoying the home hes worked so hard to build.
But what do you do when home doesn't really feel like...home anymore?
Why you get a dozen new skeleton roommates, that's what!
-
Bookmark Notes:
Ch2
-
Tags
Summary
Ficlets of smut from all over the Undertail verse and alternative universes.
Each chapter is it's own story. The title has the pairing. The beginning notes in each chapter have any additional warnings for the story.
These are very customized pieces. Contact me on Twitter (@DarkCrysDemon) or email ([email protected]).
-
Bookmark Collections:
-
Bookmark Notes:
Chapter 4/ Done
-