So right, there's a bit of a cultural divide, here, but speaking as a Westerner, I don't particularly see much fragile beauty in an undefined, temporary, chaste relationship that it's implied the participants will look back on with bittersweet sighs while caring for their husbands. I'm into the struggles of identity, place in society, and self-concept... and a good coming-out story helps, too.
So, let's make a list of the best yuri stories that are actually about being homosexual or otherwise LGBT. Ones where it's either explicitly stated, or identity questions are at least wrestled with.