QUOTE:
Has anyone seen Descendants of Darkness? I have read reviews and it seems pretty good. There is mild yaoi content as well.
Yami no Matsuei (or descendents of darkness in english) is one of the best series around. I fell in love with it the first time I saw it, and if you're looking to watch (and/or read) it, I highly suggest you do.
The manga is a little more explicit than the anime and has more info as well. The anime itself is very good, but if you want more content, then the manga is a bit better.
Yami itself isn't yaoi (it's implied shounen-ai), but it falls under the "yaoi" category, partly due to its doujinshi section.