I started this anime a few months ago and finished the series. When I first started watching I thought, "Oh this is pretty good so far." The beginning was good but when it came to the middle, it went down hill. I mean, knowing about the brother is nice and all but I didn't think it had to take so many episodes. The ending was just awful because there is no ending.
I saw that there was 2 OVA's and a movie and was hoping that it would have a decent ending. I watched the 2 OVA's and just couldn't believe that it just left you hanging. I then went and looked for the movie and come to find out, it's crap you've already seen from the anime series, movie based on just flashbacks. I didn't even bother to watch it since I pretty much know most of what happened in the past.
I can't say anything about the manga cause I haven't read it but I plan to. I hope that the manga is much better than the anime cause I was truly disappointed in it.
I'll tell you this, if you want to watch a series like this, look elsewhere. This anime is pretty much a waste of time.