The Uncle Nai Extended Universe
Series Metadata
Listing Series
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Run Like Roller Coasters by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
28 Feb 2024
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Summary
The year is 2010 and a fateful meeting is about to occur at a warehouse party between one Knives "Nai" Saverem and one Nicholas "Drink-thieving" Wolfwood.
Of course, it's a hot mess from the start.
Of course, they catch feelings.
Of course, they manage to fuck it up.
A prequel to "Help, My (36M) Subs (30M, barely 17M) Have Unionized" set in the Uncle Nai Extended Universe.
Series
- Part 1 of The Uncle Nai Extended Universe
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Assume the Position by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
30 Dec 2023
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Summary
Vash asks for help with his physical therapy exercises, and Nai would be a horrible, bad uncle to refuse.
...right?
Takes place the year prior to "Help, My (36M) Subs (30M, barely 17M) Have Unionized" in the Uncle Nai Extended Universe.
Series
- Part 2 of The Uncle Nai Extended Universe
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Fraudulent Activity by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
12 Sep 2024
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Summary
Uncle Nai's credit card gets flagged for an unusual expense. A vibrating, nine-inch expense, to be precise...
Guess it's time to have a little talk with his teenaged nephew about asking for permission before making adult online purchases.
Takes place the year prior to "Help, My (36M) Subs (30M, barely 17M) Have Unionized" in the Uncle Nai Extended Universe.
Series
- Part 3 of The Uncle Nai Extended Universe
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Siren Song by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
05 Sep 2024
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Summary
Nai helps his nephew recover from his latest operation by assisting him in the bath.
Things go more than a little sideways.
Takes place the year prior to "Help, My (36M) Subs (30M, barely 17M) Have Unionized" in the Uncle Nai Extended Universe.
Not necessarily canonical.Series
- Part 4 of The Uncle Nai Extended Universe
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Help, My (36M) Subs (30M, barely 17M) Have Unionized by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
19 Jul 2023
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Summary
Vash has a little problem: namely, a massive thing for his Uncle Nai.
It's fine, really. He can handle it on his own. (And does, with astonishing frequency.)
But Nai inviting over a tall, gorgeous "old friend from work" for the first time since Vash has been living under his uncle's roof brings with it an insatiable curiosity.
And an opportunity that's too tempting to pass up…
”Oh? And what'll I tell him? Hey Vash, I lied about the whole coworker thing, this is just my annoying ex that I occasionally have filthy, kinky sex with? What a great example to set."
"Why not just go with the classic 'do as I say, not as I do?'" Wolfwood's pulling Nai's belt free, and Vash's eyes widen as he realizes what he's about to see. "He's old enough to get it, he's a horny teenage boy for cryin' out loud. Nobody expects you to be a saint. Gotta have a little fun…"
Nai huffs, but then the sound turns into something much more aroused as Wolfwood shoves his pants and underwear down over his hips and— oh my god. Oh my fucking God...
Series
- Part 5 of The Uncle Nai Extended Universe
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Good Morning, Sweet Prince by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
16 Aug 2024
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Summary
It's the first day of the rest of their lives.
Uncle Nai quietly panics to himself in the kitchen over his seemingly-incestuous destiny. Nicholas relaxes on the patio with a well-earned cigarette and a well-used ass. And Vash wakes up in his uncle's bed and discovers that it was not, in fact, all a dream.
And then there's the spanking...
There was no way in hell this morning was ever going to be normal.
The direct sequel to "Help, My (36M) Subs (30M, barely 17M) Have Unionized" set in the Uncle Nai Extended Universe.
Series
- Part 6 of The Uncle Nai Extended Universe
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Uncleverse: A Short Story Collection by seidrade
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
14 Nov 2025
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Summary
A collection of fic requests set in my Trigun Uncleverse AU.
Each chapter is a different request fill. This will include a variety of pairings, all of which will be named in the chapter titles. I've listed some of the most prominently featured and important tags, but please see individual chapters for all prompt-specific tags!
Featuring such titillating scenarios as:
✨ Vash in pussy tape and Nicholas in chastity as punishment for fooling around without permission
✨ Nai and Tesla going at it while trying to not wake baby Vash sleeping in the next room
✨ RLRC-era Nai making teenage Nico wear cum-filled panties in public and flash old men
✨ Legato licking and humping Nai's boots at the Crimson Nail
✨ Vash getting a pop quiz from his uncle while riding a Sybian
And more to come! Please enjoy~!
Series
- Part 7 of The Uncle Nai Extended Universe
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The Nephewverse by seidrade for GHOSTlNG
Fandoms: Trigun Stampede (Anime 2023), Trigun (Anime & Manga 1995-2008)
13 Jan 2026
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Summary
An alternate version of my Trigun Uncleverse AU in which Nai is the teenage nephew and Vash is the uncle. Wolfwood's there too, being an absolute problem for everyone involved. Well, specifically for Nai, who doesn't appreciate having yet one more obstacle in his hero's quest to obtain his uncle's affections (and pussy.)
Thus unfolds a classic tale of weal and woe, as one horny teenage boy discovers he may have bitten off more than he can possibly chew.
Welcome to the Nephewverse.
Series
- Part 8 of The Uncle Nai Extended Universe