One of the best animes I've ever seen!
Seriously, this anime is amazing! It's so different from other animes. I know it's old and the art looks old but do NOT let that scare you away from this brilliant anime. The story is written so well. Very clever story telling. I actually preferred this one over the other OVA (2001 prequel). Wow, just wow. Loved it! 10/10 - a good old gem of an anime. Don't miss it!
By the way, if you do want to see this anime, watch the 2001 prequel first or you will be confused.