Ayashi no Ceres

The series, by Ms. Yuu Watase, is a rather gory and romantic tale about a celestial being (an angel for you slow ones) whose robe (hagaromo) was stolen. This robe allowed her back into heaven. The man who stole her robe, then lied he didn't know where it was, 'forced her to be his wife' (as Ceres, the angel, put it) and the main storyline follows the fate of her decendents.

In modern day Tokyo (I'm guessing, they never really do say), we have Aya and Aki Mikage on the eve of their 16th birthday. Aya decides to go get her fortune told, and doesn't realize how real and true it is. The next day, she and Aki go to their grandfather's only to be shown a mummified hand, which does have a great signifigance in the story. Well, much blood, kisses, and floating occurs, and we meet the Aogiri's, who also have some of the celestial blood in them. This goes to that, and it ends up being a very good series. Along the lines of being a very good celestial followup to Ms. Watase's first major series, Fushigi Yuugi.