Actually, the story I was thinking of didn't have any other pairings.... it had a plot instead ^^; And that made it really something else than a depressing lot of yaoi fics.

Personally, I always found that "obvious" around Rika, being about as stereotypical lesbian as you can get without making her a complete butch. It just keeps surprising me how many bad het clich鳠they can use with her, but how you never see her being a lesbian as a yaoi subplot.