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the big kinktober 2025 special by ohitsthatguy for YeeSans
Fandoms: Undertale (Video Game)
18 Oct 2025
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Summary
so uh
i am writing and dedicating all these works to a very very special friend of mine, pookie when you read this, hi ily <3be aware i have no shame so a few of the chapters are on the really weird side of things, so please read over individual tags and warnings provided
happy gooning and spooky month for you all <3
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Geno observes the timeline and hardcore yearns for Sans while only partly realizing that's what they're doing. This crush is not going well, folks.
- Language:
- English
- Words:
- 570
- Chapters:
- 1/1
- Hits:
- 2
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Summary
I ran out of tag room, so it’s being split up! Hope you enjoy nonetheless!
Series
- Part 2 of Cactus’ Kinktober 2025
- Language:
- English
- Words:
- 500
- Chapters:
- 1/?
- Hits:
- 18
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There’s no substance or anything good about these fics, they’re unapologetically sucky.
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Now that Cross was finally back, Killer was never letting him leave his side again.
Series
- Part 6 of The World Ended When It Happened To Me
- Language:
- English
- Words:
- 487
- Chapters:
- 1/1
- Kudos:
- 6
- Hits:
- 39
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Some nice and gentle dom/sub with Nightmare and Ccino
Series
- Part 18 of Kinktober 2025
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Undertale Kinktober 2025 hypnosis edition by Chris_ghosty77
Fandoms: Undertale (Video Game)
17 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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Killer had his babybones, Crescent, very recently. This seemed to have just amplified his own selves instincts up to 100.
But,when Dream eats a negative apple,band becomes shattered..
Nightmare had changed too..
Passive didn't remember him. Passive was never him.
He attempts to join shattered, to keep his child safe. But shattered didn't want to risk killer's life.
So he advised killer to leave this multiverse, and find a safer one. For his and his child's sake.
He travels and finds many, many multiverses that wouldn't take him..or his child.
But, when he accidentally falls into a portal, leading to a nightmare variants home...
Will he find himself a home there?
Or will he and his child have to keep looking?
Series
- Part 1 of Multiversal chaos:)
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"Yeah? You want me to thank you?"
Between the exhaustion sat something unstable. Mania, sharp and wet in his tone.
"I want ya to think about what it’d be like if Killer or Dust were the ones taking care of you," Horror said, grin widening slow enough to show too many teeth. "They wouldn’t be half as gentle."
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Such A Pretty House and Such A Pretty Garden by Cherry_Dean3
Fandoms: Undertale (Video Game)
17 Oct 2025
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Summary
Wanting to spend time with his "dead" lover, Killer goes to the place he loved most.
Series
- Part 5 of The World Ended When It Happened To Me
- Language:
- English
- Words:
- 456
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 30
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Kamari333's Kinktober shorts, following the prompts set along HERE.
Another year of Kamari333 doing their best to celebrate Kinkplay and the fun of erotica <3
Individual tags in the chapter summaries and notes.
Functional Table of Contents (with tags and warnings) included!
Series
- Part 9 of Kamari333 Kinktober Archive
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A sweet little series set in a world where monsters had been captured from the beginning instead of shoved underground.
Eventually, as the years and generations pass, both humans and monsters slowly forget the monsters were ever free.
We follow the story of an aging little zoo hoping to expand and take in a few monster pups. And the stories of several monsters who find themselves being transferred to the place.
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First kinktober ever, list isn't complete but trust it will be done by Halloween.
Dedicating this fic to my very very special friend of mine. Pookie, if you see this, ily <3
Uh yeah, hope y'all enjoy ^^
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Every year on the anniversary of the Truce between the Bad and the Star Sanses Nightmare hosts a party at the castle for all to attend. We meet the players in the party.... At the end an unexpected guest to the multiverse makes their apperance....
The tags will constantly be updated as the story goes
Series
- Part 2 of Into the Multiverse
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My first Kinktober attempts :)
Series
- Part 1 of Cactus’ Kinktober 2025
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Red wakes up in an AU that's not his own. After being taken in by Sans, his adventure begins. Drama, violence, silly insults, actual serious moments, romance, and more!
I don't know what tags to use, so tag suggestions are welcome!- Language:
- English
- Words:
- 1,200
- Chapters:
- 1/1
- Kudos:
- 2
- Hits:
- 9
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Summary
Nightmare and the Corruption are two individuals. And they discovered how to have sex with each other. Killer discovered them fucking and mistakes it for "complicated Masterbation"
Nightmare and Corruption decide to have Killer join in as their 3rd.
Nightmare/Killer/Corruption
Female genitals and male genitals______________________
I meant to post this on October 14th, to post a very Gay and genders not being "black and white". Better only "late" by two days, that never.
Currently I'm posting porn on racists/bigots birthdays to spread fun Gay/Lesbian/Rainbow porn. OR until the "credit card censorship" is less of a problem.
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Cross abandonment fic!
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Nightmare isn't interested in breeding this year, but with centaur numbers dwindling, the sanctuary workers have to take matters into their own hands.
Killer tries his best.
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Nightmare, trapped in stone for a millennium, awakens to find the world completely changed. And his lovers to be in a less-than-stellar condition.
It is possible to hate flowers, of all things, with all your being?