So I watched the T.V series, before this and when I found out that Yoshiaki Kawajiri had created the original OVA, I knew I had to check it out. I was expecting a lot more blood, guts gore, nudity and his trademark char designs, but what I got was much of the same as the T.V series.
Story- Aside from a few characters added in the T.V series, just about the exact same story. I don't really want to spoil, it though but if you've seen the T.V series you know the circumstances that Tsutomu and Birdy find themselves in. There is deffinetly lack of char development that the T.V series had and I believe this OVA is much more fighting oriented.
Animation- As expected of Kawajiri, this anime has great animation for its time. The monsters look good, character movements are fluid and the action is great. However like I mentioned above theres not really that much blood... so if your watching it for that you'll be dissapointed. Also his trademark char designs that you see in shows like Vamp Hunter D, Ninja Scroll and Highlander are no where to be seen. Comparing it to the T.V anime, I honestly think the first season was better animated than this OVA, however the 2nd season deffinetly took a dip in quality.
Sound- Nothing really memorable stands out to me, but the music that was there was fitting.
Characters- the banter between Tsutomu and Birdy is fun to listen to and his family are there too for some comic releif. Don't expect as many characters as the anime though, especially on the Federation agent sde.
Overall- Not terrible, but I wouldn't say it was anything amazing either. If I had watched this OVA before the T.V series, my opinion may have been different, but I came in expecting blood, gore and tits and it did deliver to some extent, but still couldn't meet my biased expectations.