Five Things That Never Happened to Sawada Shin  by Nekomaxwell.
Pairing: Sawada Shin x Yamaguchi Kumiko
Warnings: Depends on each piece.

This is hillarious. There might be art in later posts of it (which you can find in the memories of the shinkumi LJ com). Basically, these are short drabbles or art of things that never happened in the anime/manga/drama but that we wish did. Goofy, hillarious, etc. The ratings are between pg and nc17 and borrow from every aspect of the series. Hillarious, sweet, sometimes smutty.

Sacrifices by Calophi
Pairing: Sawada Shin x Yamaguchi Kumiko, Shinohara + Kumiko, etc.
Warnings: ?? Unknown
Again, I'm linking the first part and the rest will be in the shinkumi com memories, but this is -amazing-.  At the time this came out I was writing a new Gokusen fic where I wanted to do something exactly like this and she beat me to the punch. XD It's fantastic, and she's totally nailing the characters and how I think they'd react to this!

30_k Sequel by Seoinage
Pairing: Sawada Shin x Yamaguchi Kumiko
Warnings: Probably some violence, language, etc, maybe just a touch more than you might see in the manga or anime.

Seo is wonderful, and because she's wonderful she's keeping me happy by writing a sequel to my 30_kisses. And it's fantastic because she's got an awesome grasp on the characters and has fun ideas and works flaws into them and then out of them and.... and if you like Gokusen, you'll like this. *_*

And Now Fragrant Blossoms Peal in Dusk by Seoinage [Sawada/Kumiko]
For moi! I pestered Seo for something Shinkumi but angsty, kind of sad, slow, morose... and she gave me this lovely piece, which is very well suited to the evening and fall or spring. Soft, smooth, dark.

Gossip Gone Awry by Aoimidori [Shin/Yankumi? Mostly gen.]
Hillarity ensues when the non 3-D students of Shirokin get the wrong idea about Shin. Or is it the right idea? Well, it's hard to say. But it's damned funny.

Drunken Confessions by Aoimidori [Shin/Yankumi]
Well, Kyo got Shin happily inebriated and completely to unable to walk. And then left him in the hallway of the Ooedo complex for his Oujo to stumble across. XD Poor Shin. Poor Yankumi!

50 Sentences by Aoimidori [Shin/Yankumi]
Okay, okay, I know I just rec'd a whole bunch of her in a row, but she's on a roll. Aoi is awesome at making the 'theme' for a sentence unstated but absolutely said, and her characterization is spot-on, fun, and romantic in a very ShinKumi way. Very, very enjoyable.

Paths by team7 [Gen with underlying Shin/Yankumi]
I think I've read this before, but I can't remember rec'cing it. At any rate, it's got that mellow but serious tone you get when Kumiki and Grandfather are talking and does a really nice job with the kind of atmosphere you would want from a piece like this. Solid, light, lovely.