As with many OVAs, Fortune Arterial's doesn't contribute much to the series other than some additional conversations and a particularly long onsen section with partial nudity. If you're looking for some explanation/better conclusion for the series you're going to be disappointed. Nonetheless, the episode comes across as a fairly easy watch with a few interesting moments mixed in. Still, I'm not quite sure how the OVA is currently rated higher than the main show... Animation: I watched a low-res version of this OVA so I can't really judge the sharpness/detailing relative to the original. For the most part everything is consistent with the main series but plusthe aforementioned ecchi scene.

Sound:
You get the standard TV OP and ED, same BGM, and same VAs.

Story:
This OVA takes place after the events of the TV series where the council (and some others) are relaxing after a successful school festival. They take a trip to a beach house where various activities take place (tennis, onsen, etc.). There isn't any serious plot behind any of the events and, most unfortunately, no further explanation of how Kouhei will resolve Erika's little family problem.

Character:
There is absolutely no additional character development in this OVA. All you can expect is what results from taking the main cast and plopping them by a lakeside cabin; all characters seem to behave consistent with their personalities in the main series. Except that you'd think Erika and Kouhei would have made some progress by now...

Value:
This is your typical "for fans only" OVA. If you liked Fortune Arterial, then this may be a fun addition. Just don't watch it expecting a more satisfying conclusion.