Santana/Brittany. Starts out in season one explaining how Santana fell for her best friend. All the unscripted/unaired interactions between the two. I promise the story is better than the summary ;
Glee - Rated: M - English - Romance/Friendship - Chapters: 22 - Words: 127,416 - Reviews: 385 - Favs: 856 - Follows: 442 - Updated: 7/19/2011 - Published: 4/14/2011 - Santana L., Brittany P. - Complete