The Big Battle OVA is enjoyable from start to finish. I'm surprised it doesn't even reach a 7 when it comes to average ratings, but good taste doesn't grow on trees. Unlike Red Shoulder Document / Roots of Ambition, Big Battle is a self-contained 'side-story,' an adventure that has little to do with the main series. It doesn't tell us anything new about Chirico, Fyana, or Ypsilon. That's great. Niva is the star of the show here, being introduced and having his whole story finished within one sitting. He's a straight forward antagonist. With Fyana being present, those who have finished AT VOTOMS know that there is still somethingat risk; and that makes for better emotional investment as Big Battle's simple, but enjoyable storyline unfolds.

Give it a watch if you like VOTOMS.