This will probably be the shortest review I will ever write.
As I said in my review for the Lucky Star series, KyoAni constantly references and criticizes the anime genre as a whole. Significantly, it also references and criticizes consumers of anime, including those watching the series. This OVA goes exactly one step further, exploring what would happen if the viewers’ volition filters back into the anime. What would happen if the fandom – and its associated theories, frustrations, and obsessions – become part of the show itself? Well, you get this OVA, which in Lucky Star fashion follows the same plotless, trope-filled, single-sided characterization that the main series is known for.
For better or worse, you absolutely do need to have seen the main series before seeing this, as this OVA interacts differently with those who are familiar with its characters and style. Watched the series? Yes, you need to watch this too.