Morning by elihice
Pairing: Rikuo/Kazahaya
Warnings: None really.

This is a fun little piece. XD  We all know Rikuo has this wonky habit of waking up Kazahaya in strange and unusual ways, but...

Miscellaneous GD fics by R-chan
Pairings: Mostly Rikuo/Kazahaya with some canon references to others.
Warnings: See each fic.

I'm just linking this girl's page because there's no better place to find these.  They aren't perfect if you're looking at the English, but the situations and writing are very fun and generally very good. The stories make any weird typos worth it by far. Favourites include 'You're a Cat', 'Freud' and 'Hearts and Flowers'.

D is for Distraction by A. Riddle
Pairings: Strictly Rikuo/Kazahaya
Warnings: None really. She's doing the alphabet, but I'm linking the ones I like best.

Basically a series of shorts for each letter of the alphabet from Rikuo's perspective. Some of these are fantastic, some of them weren't my cup of tea. So while you might want to read all of them (not required-- they fit into the series whenever) I'm only linking the ones I like best.  I love the posessive element of this, and how Rikuo is snarky even inside his own head.
Covetessness, etc. The rest can be found on her LJ.

Little Things by Oki_chan [Rikuo/Kazahaya]

XD Fun, snarky, background info and a set up and some brief...well, it's not like it's long, it just packs a lot into a short space. Fantastic.