Baka to Test; it may be stupid but it's at the point of being stupidly fun without moving into annoying and this OVA is no different. As the synopsis states, it's an adaptation of the Festival arc in the manga. It's recommended that one watches the first season before watching the OVA as to not miss out on some of the references to events seen in the first season. You don't have to, as this is simple minded fun and can be enjoyed without knowing what happened before (And that the first season was pretty episodic at times). But it's recommended nonetheless as it would be a shame to miss out on the fun of season one.
Not much can be said about the story, as all you need is in the synopsis. It aims to be an adaptation of the manga festival arc and it does just that. It has the beginning of the festival, the festival itself, the twist, the solution and a conclusion to it all without leaving any loose ends. It works, simple as that. And it's not only simple, but it's fun. As usual, it provides laughs and without mixing and matching character traits to make it non-canon. You may not laugh at everything but I sure did. It's stupid but it aims to do what it does best and with an actual plot.
The animation looks the same, yet better. I guess they kept the look and polished it up without losing the charm of it all, or the good looking crossdressing. The show does that stuff so well, be it with chinese dresses or maid outfits; it's amazing.
Ahem. Sound is as good as before and the music is oddly enjoyable. Not to everybody's taste but it suits it. Kinda nonsensical but fun.
It doesn't aim to add depth to the characters but it works to make them fun to watch.
Quite simply, if you enjoyed the first season of Baka to Test, you'll enjoy this and it'll help tide you over for the second season wait. If you enjoy comedy, check out the first season and return to this. Once again, this is an adaptation for the festival. Nothing more than that and that's how I primarily graded it; an extension to the main series and not as a stand-alone work.