NECROPOST!
Fansub is out though it was quite tricky to play it.
Now that I knew what the hell the characters were talking about, this freakin' good stuff...
...with a bittersweet ending! 
It basically ended with Iori leaving his hot lover twin sister Iku behind at the train station.
Typically with just an OVA episode based on a manga with lots of volumes, the quality of plot and characters would have been shot to hell. This wasn't the case; the characters between the brother and sister were well fleshed out (though it was almost too "soap opera-ish"). This series could have expanded to many episodes, but the producers opt to show off this one story; it was good enough.
Check this out even though you're squimish about a brother and sister making romance!
). You can find the synopsis of this here. So far, ).
