1 - 20 of 546 Works in W. D. Gaster/You
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You fell into the void. It hurts to understand the man that speaks in a broken and foreign language. Literally. Your head feels like its about to be split open every time that man speaks.
or, a reupload of sanctuary because I accidentally deleted it and I am far too stupid to use ao3.
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Yeah, it was a good day. Sun was shining, birds were singing, and all in all, you were ready to get to work and stretch your creative muscles.
Of course, you should have thought it wouldn’t be that easy. Some mornings started hard, and ended easy. Some started easy, and ended hard. But they almost never started easy and ended easy, and today was going to test the bounds of your patience like nothing ever had.
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12 Skeletons, 3 Ghosts, 2 Harems, And A Gamer by syst3m_of_3rr0rs
Fandoms: Undertale (Video Game)
10 Aug 2025
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Summary
You're thrown into the world of your favorite fandom/game where you end up living and interacting with the most cliché storyline in the entire universe of anti-harem fanfictions.
That's it.
That's all it is.
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Ever wonder what it's like to live in the world of your favorite fandom with your favorite characters? No? Then this book ain't for you. But if you have, then strap on in and enjoy the ride guys, gals, and nonbinary pals, cause this is gonna be the adventure of your life!
(WARNING: Slow updates, [probable] short chapters, major chapter editing. Also, some characters might be a bit OOC.)
Previously titled; "It's sad, I'm sad. I miss you. How did this happen?"
Series
- Part 3 of Undertale Stories
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Our sweet honey by BurningToTheBone (ShadowStory900), ShadowStory900
Fandoms: Undertale (Video Game)
08 Aug 2025
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After a long time of planning you thought you were ready to adopt a little roommate but nothing went as you had planned, no bitty really caught your attention or they didn't seem interested in you.
What kind of bitty was he? How were you going to take care of a colony of them? And more importantly, why were they looking at me like that?
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It's rumored that the monsters living on the other side of the city grew feral in their isolation underground... But none of that seems true to you, so you decide to visit Downtown anyway. Unfortunately, just like with humans, a few dangerous groups do exist, and your encounter with one lands you in the care of Dr. W.D. Gaster. To avoid political issues, you're secretly kept in his care for your entire recovery process, during which some interesting things come to light. For one, your doctor is a huge nerd, just like you are. More concerning, though, is the development of his thirst for your blood...
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Reader and WIng Gaster the royal scinetsit are tigether orever they are dating and Gaster send you lover leteter wehiles hes ay work
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The Scientific Method by ThePUNisher
Fandoms: Deltarune (Video Game), Undertale (Video Game)
31 Jul 2025
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You are a massive fan of theory crafting videos. While you weren’t as preoccupied with them when Undertale came out, you’ve matured enough to find the beauty in them once Deltarune started coming out. Following the release of Chapters 3 & 4, you decided to get your hands dirty and examine the game for yourself in hopes of finding your own meaning. However, as you start up the game, something very, very interesting happens. What follows can be described only as a once-in-a-lifetime opportunity that melds the boundaries between fiction and reality.
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⚠️THIS TAKES PLACE AFTER THE EVENTS OF CHAPTER FOUR, READ AT YOUR OWN RISK!!⚠️
__________________________________________So like, Pretty much Kris throws you under their pillow and sneeks out the house to hang out with their friends. They left their phone in their room and GASTER STARTS CALLING THE PHONE?! Whats gonna happen next….? 😇
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I work at an abandoned laboratory, there’s a strange list of rules for me to follow. by Coffeeshops
Fandoms: Undertale (Video Game)
22 Jul 2025
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You're hired to transcribe the temperamental Dr.Gaster's lab notes, but the contents are starting to worry you.
After catching glimpses of a figure lurking in the dark around the facility, a strange blue glow in the corner of your vision, and hearing a voice that certainly doesn't belong to the mute Dr. Gaster; you're starting to realize that you're not alone here in the facility, and that the consequences of not following the growing list of rules Dr. Gaster supplies you with might be worse than a simple loss of employment.Your stay at the facility was supposed to be temporary, but neither of the occupants are ever going to let you leave them.
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You spend your days reading and making deliveries for your carrier job, life is pretty normal. Weeeell, that's until you meet some well dressed skeleton brothers under..... uncomfortable circumstances. But that's alright! You'll work hard to make up for past mistakes. Relationships may grow although, someone might get a little "handsy" in the future. Welcome to my very first fan fic, but certainly not the last ;3
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The reader is W.D Gaster's assistance
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Bedside Manners and Guns by absurdmagewrites
Fandoms: Undertale (Video Game), Mafiafell - Fandom
20 Jul 2025
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You were a simple med student until the night you found a monster bleeding out against the side of your apartment building. Following your oath to first do no harm despite not being a doctor yet, you take him in and try to care for his wounds. Little did you know he was a member of the Serif Family Mafia and to makes matters worse...
He was the one in charge.
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THIS WORLD I CONNECTED TO YOU,
THIS WORLD I CONNECTED YOU TO.
WAS IT TO YOUR ENJOYMENT?
(An analysis on what it means to be hunting easter eggs for ten years, and on belief giving gods their power.)
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The Skelton sub-species is dying out in every universe.
Gaster is worried about that and decided to do something about it.(Should I be making a new skeleton reader story...no.
Am I going to anyway...yes.)Inspired by Making a Monster by absurdmagewrites
and my own fic, I'm No Human.
Series
- Part 2 of Skeleton readers amiright?
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A DAY OUT [Dr/Ut ONE SHOT] by UncharismaticCandle
Fandoms: Deltarune (Video Game), Undertale (Video Game)
17 Jul 2025
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*You, the self-proclaimed confectioner and baker.
*You meet a very strange guy at a bar.
*You are about to get his phone number.
*It's going better than you expect.
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A budding journalist blacklisted from the industry and down on their luck stumbles across a lead that could change everything.
Monsters are going missing in Ebott city, and a new drug is being manufactured that lets humans preform magic, at a cost.
The investigation takes a turn when a chance encounter leads you to meeting Dr. W.D Gaster, a mysterious scientist who is very clearly the one behind the drug's manufacturing - if only you could prove it! While Dr. Gaster typically finds himself apathetic to human kind, he finds your antics quite...charming. He'll humor them, for now. -
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"Traumatized people chronically feel unsafe inside their bodies: the past is alive in the form of gnawing interior discomfort."
-The Body Keeps The Score, Bessel van der Kolk
Dr. W.D. Gaster is not a happy man...but he had been, once. Perhaps he could be again.
...and he can't stop thinking about you. Can't make himself stop thinking about you.
A story in which love, quite literally, saves the world.
(Now in Arc 2)
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Ever since Gaster came into your life, things have been nothing short of dramatic; You'd fought with his younger brother, Sans, discovered magic and became a mage, freed Gaster from the void and destroyed half the Underground in the process as well as reunited Chara and Asriel with their family.
Maybe a beach vacation with your new friends is just what you need to unwind from the stress of your life.
Of course, these are monsters you’re dealing with, since when has anything involving them gone according to plan?
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lovers reunite. based on the fun value room.
— short blurb i made bc i missed writing about gaster