The show follows two Japanese teenagers who have been brainwashed by a powwerful criminal organisation into becomming ruthless assassins. Both the main characters Ein and Zwei, are troubled by their blood stained existence, although for seemingly different reasons, and find solace only in each other.
I was a huge fan of the OVA that this series is based on and as such very excited when I found out we were getting a full series version. I have to say that I was not disappointed. The animation is great, the music just as fitting as I would have hoped and the voice talent is top quality. This has already become one of my favourites of the new season and I cannot wait for the plot to develop and to see more of the main characters interactions with each other. All in all this is a really fantastic show and an absolute must see.