I'm looking for recommendations for... anything, really. I don't care if it's an anime, manga, visual novel, whatever (as long as it's been translated to English, at least). I want a yuri series with an actual relationship. Endless episodes of girls half-flirting and blushing at each-other doesn't count. An actual relationship, where both parties acknowledge that they're into the other, go on dates, have dumb arguments, whatever. There are series that focus on straight couples instead of teasing confessions, even if they're vanishingly rare, but I don't know of any lesbian works like this.    
I don't mind porn, but works where the relationship is in service to the porn (like the Sono Hana VNs) are not what I'm looking for.