one of the 2010 ova's selling points is it's absolutely BRILLIANT animation, made by studio ordet. the animation was worked on by key animators who previously worked on the likes of gurren lagann, monogatari, madoka magica, fullmetal alchemist, love live, and more. as a result, the animation on this movie is smooth and badass, especially during the BRS fight scenes. you transition from innocent and slow-moving slice of life scenarios to fast-paced action girl battles. here is a gallery powered by sakugabooru+ that features some examples of the ova's gorgeous animation.