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Corruption Tale by TimeWitchHilda
Fandoms: Undertale (Video Game), Undertale Yellow (Master Sword Video Game), Deltarune (Video Game)
05 Dec 2025
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Summary
What of instead of the Human Monster War A Virus took hold that slowly corrupted the Humans and Monsters of the world? What if When Chara Fell Into the Underground She merged with Asriel to try to save the world above? What if when every Human fell They tried to escape the corruption above? What if the Barrier was meant for a safe place instead of an imprisonment? All of these questions will be answered with Frisk who knows somethinf about the Virus that no one else knows. Maybe it's even something Chara knows to. Will these two Humans whose lives are a Century apart manage to save both the Underground and The Surface of this evil Virus?
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Hello I recently got into Friday Night Funken and I saw an AU with this Corruption story. And I think of doing something similar but not quite the same either. I hope you all enjoy.
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These Photon Readings Are Pretty Negative by VioletofAngst
Fandoms: Undertale (Video Game)
05 Dec 2025
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Summary
****Tags will be updated as story progresses or as I think of things****
W.D. Gaster is a mad man, if you ask his sciencists. Rumors fly around the lab, circulating through New Home. Hearing voices, talking to air, keeping private projects locked in hidden labs under security so thick not even the King has the keys. After his disappearance, the CORE’s Central Labs get shut down. Permanently.
Twenty years later, during the final shutdown of the Underground’s camera systems, there’s something spotted. Someone spotted.
Broken, beaten, quiet. A shell of a man previously full of an infectious, whirlwind energy.
What…happened?
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William Daniel Gibson is a curious little boy.
Curiosity is a curse under our Lady’s watchful eyes, and cursed children don’t survive for long. As is Her Decree.
But Hell isn’t really all that bad. At least in his opinion.
(Bill’s Story Rewrite)
(This is a fanfic, but the fanfic-ness doesn’t start until chapter 2)
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“Sit down.” Grillby’s voice pierced the silence, “You left the door unlocked, so just tell her to come in.” Grillby pointed to Gaster’s desk roughly in the center of the room, approaching it with quiet footsteps. Gaster shivered at his words, but obeyed; Grillby was definitely planning something to get back at him, and he was intrigued. He saw Grillby shuffle under his desk as best as he could, hoodie pulled back over his flames to help stifle his glow.
Gaster’s face vaguely shifted to confusion, “Wait, what are you–”
Another knock on the door. His gaze drifted back up to the hallway.
“Answer.” Grillby said, “Don’t keep your guest waiting, Gaster.” He had a hint of something low and mischievous in his voice. Gaster’s brow bones furrowed slightly in an emotion he didn’t know how to identify, his tired eye lingering on his sharp ones.
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Don't ghost your (boy)friend for too long or he'll do something crazy freaked out bro
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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
31 Oct 2025
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Summary
New kinktober! One chapter a day for the entire month!!! With a list I made myself, very excited to show everything I've written.
Just like the other ones every chapter contains some form of hypnosis/mind control/brainwashing. I'll do my best to tag but i can't tag absolutely everything so look at the warnings at each chapter or in the table of contents.Series
- Part 14 of Undertail hypnosis series
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Summary
Grillby didn't like dwelling on negative emotions. But it's hard not to feel them when a familiar skeleton comes back into his life.
Or
Gaster shows up at Grillby's after years of no contact.
[I promise my writing is better than this summary.]
- Language:
- English
- Words:
- 2,764
- Chapters:
- 1/?
- Kudos:
- 3
- Hits:
- 54
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Summary
Gaster was just finishing off his cake when a neighboring party set off the first firework of the night. The skeleton jolted at the boom that quaked the mountain beneath them. Gaster did his best to quiet his rattling as colors burst in the sky. Grillby sat close and wrapped his warm arms around his shoulders. The skeleton took a breath and melted into the embrace.
Grillstertember prompts: Fireworks and Fireflies
- Language:
- English
- Words:
- 648
- Chapters:
- 1/1
- Kudos:
- 5
- Hits:
- 57
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Summary
The city of Daiport has many things to brag about. It's ancient history, the beautiful mountain ranges and of course, the glistening ocean beaches that hug a good portion of the city's outskirts.
It's also the home of the monsters that emerged from deep within Mount Ebott.
You, having left your strict family upbringing to chase after your love for the ocean and a dream to become a professional dance choreographer, find yourself in a city quite unlike any other. But life continues much as it always has since you moved here. You work in the local surf shop, train for the biggest dance competition of your life, and spend all of your free time in the water. That is, until a chance encounter leads you to meet a monster who turns up the heat in your life.
As for said monster? He's never met a human with hair as bright as his flames. He finds himself drawn to you for reasons he can't fully understand. So the question you both have to wonder is:
What happens when water and fire collide?
Part 1: Chapter 1-33
Part 2: Chapter 34-49
Part 3: Chapter 50-We're back baby
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waking up in the body of a skeleton wasn't exactly what you were expecting. the last thing you remember was... the Only thing you remember was a deep, freezing cold (like you would never be warm again), disorienting, blinding, swirling white, and a flash of burning pain. then... nothing. nothing about who you are, who you were. though... the two skeletons in front of you seem familiar, like a memory you can't quite reach. here's hoping you can figure out Something.
the first one falls
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Fall cleaning was Gaster’s least favorite time of year. Don’t get them wrong, they absolutely loved fall, from the holidays and decorations to the various seasonal treats, it was by far their favorite time of year.
Except this. See, it wasn’t the cleaning itself that was the issue, she actually rather loved cleaning, but rather a specific stack of boxes in the back of the attic she always managed to stumble upon. It didn't matter where they were trying to go, what they were getting, or even where they were facing, it was always there. It seemed to haunt her, always sitting in the back of her mind. It wasn’t even like there was something awful in those boxes. They were actually incredible things. Things most people could only dream of obtaining, things that would make anyone else feel like they were on top of the world.
Anyone but her.- Language:
- English
- Words:
- 2,062
- Chapters:
- 1/1
- Kudos:
- 4
- Hits:
- 53
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The Goddess of the Sun, supportive of Humans.
The Goddess of the Moon, supportive of Monsters.
Two sisters in a battle between two species, two opposites against one another. What will happen when the Day tries to force itself over the Night?
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An outlaw stumbles onto a healer's porch, bloodied and wild. How do they fare with kindness reaching back out to them?
Series
- Part 1 of Under the Joshua Trees
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He turned off the music. “What is it you are doing here?”
Gaster sighed. Straight to the point as always. It was one of the things that he liked about the bartender. “I think my intention to come to a bar is pretty obvious, Grillby,” he answered.
Or
After a long time of not having contact with Gaster, Grillby finds himself conflicted by the sudden appearance of the skeleton in his restaurant.
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Grillstertember 2025 Prompt 2- Snowed In. But its Pirates.
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Gaster began loading the basket with plates and silverware. Shortly after Grillby came in with the containers of sandwiches and fruits. On the table was a collection of things for a charcuterie board, and of course, they didn’t forget about the cake. It was a simple, homemade spiced cake with fluffy frosting. Grillby had made it special for the occasion.
“We’ll want to get there early,” Gaster signed, “to avoid the crowd.”
Grillby nodded, “Bring the… wine?”
Gaster knew just what wine he was talking about. “I believe we have one more bottle left.”(Grillstertember prompts: Anniversary and Traditions)
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An icy rush of wind blustered through the entryway and through to his bones. Gaster blinked out into the white world before him and saw… more white. It took him a moment to realize that he couldn’t see the neighbors across the street, or the street.
(For the Grillstertemeber prompt: Snowed In)
- Language:
- English
- Words:
- 653
- Chapters:
- 1/1
- Kudos:
- 9
- Hits:
- 60
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Grillby was working one morning. The smell of freshly roasted coffee filled the empty restaurant. A red string caught his eye, something only he and his soulmate could see. It was still tied to his pinky and trailed out beyond his restaurant as it always had for years.
The bell chimed above the door. Grillby looked up just in time to see a skeleton rushing to the bar. His collar was turned up with his undone tie swinging over his shirt. He shoved his leather satchel onto the polished wood and quickly signed, “One black coffee.”
(Grillstertember prompts: First impressions / Red String of Fate)
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Grillby knew he still had much to remember, but he enjoyed their time together. Though an unspoken thought haunted him: What had happened before Gaster disappeared? Grillby never brought it up for fear of frightening his love. He was sure the memories would come in time.
In which Grillby begins to remember the sad memories.
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Gaster and Grillby used to hook up a lot, but the circumstances of their lives have made it difficult to maintain anything more than the most casual long-distance relationship, even that frequently falling on the backburner in recent years. Gaster's career fair speech at New Home High School presents an unexpected opportunity to re-kindle old passions.
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Welcome to the Underground, you’re in for a treat. Your day will be full of magic abound, dramatic thrills and spills. This is our season’s end and you know what that means: the champions bracket has reached the final match-ups. They fight for your glory, for your love, for your attention. Not all will make it. But that’s a part of the action, isn’t it? Place your bets, take your seats. We hope you enjoy these interesting match-ups we’ve planned.