I read the first six volumes of this series, but unlike the Get Backers series (artwork also by Rando Ayamine), this series just doesn't work out for me. The concept about the war between God/angels and Devil/demons, a mortal young girl who has the power of the Virgin Mary and a bunch of agents who protect said girl, isn't a very refreshing concept. To make things worse, the characters are pretty much cardboard cutouts---an innocent girl, a mysterious boy the love interest who is possessed by a demon, a hothead overprotective older brother, a smart boy and a happy-go-lucky-girl as the sidekicks. Of course I'd seen it all before.
So after reading the first six volumes, I will drop this series for good.