I'm looking for a Sess/Kag where Inuyasha basically takes Kagome into his group (becomes friends with her and everyone loves her) but then ignores her and makes up a lot of excuses why she doesn't hang out with them anymore. Sess finds her and basically becomes her best friend, and later mates her (messy because she get's attacked by some stupid youkai and she runs to his house).
In one of the chapters, it's Kagura's pov and she finally realizes that they're together when she notices 2 things: 1. Sessho retracts his claws for her and 2. they have sex at the bar and he smirks at Kouga who smells them.

Progression by Sidhe

Rated MA here on dokuga