This OVA was one of my favorite movies when I was a young teen. The anime itself helped me through so many rough times, so I will admit that I am biased towards it. However, I believe this anime, even from a not nostalgic opinion, is definitely worth a watch if you're a fan of the harem and Catgirls.
The story follows Chocola and Vanilla, two Catgirls and their owner, Kashou. The visual novel's story is quite close to the one portrayed in the OVA, albeit with noticeable and understandable changes. The characters are fun and well designed, and the story takes some bouncy twists and turns along the way, creating a sweet story that's definitely enjoyable! I definitely would give this one a go!