I'm not quite sure how to review this, to be honest. There's just something about the story that draws you in and doesn't let you go until the end. I think the story is fabulous; it keeps a nice steady pace throughout the volumes, never speeding up to the point where you find yourself at a loss as to what's going on, or lagging too much and causing disinterest.
The art is beautiful. Not your typical shoujo or shounen styles; more like something out of an older horror book. It's absolutely lovely. Chizuna looks almost like a painted doll in some of the frames; like something that doesn't quite belong where she is.
The character development is also quite good for a seven volume manga. Granted, they start out as pretty interesting characters, but as you read further you end up pulling back even more layers and discovering how complex they really are.
As for enjoyment value, I was completely enthralled for the entire series. It was positively delightful, keeping you interested and wondering about what was going to happen next. I'll probably re-read the story several times within the next few months or so.
Overall, the story was a delightful ride. In fact, I enjoyed it so much that I am probably going to go and purchase the books now, since I would enjoy having a hard copy of this. If you are a fan of psychological conditions and bittersweet endings, I would totally recommend it to you.
Some extra side notes:
When I mentioned vampires, it's not in the literal sense. The two main characters, Kazuna and Chizuna, have a type of disease that makes them crave blood to the point where they can become violent. Hence the label 'vampire'. So if you're looking for something that actually does have 'I-have-a-legion-of-bats, can't-go-out-in-the-day, let-me-suck-your-blood' vampires, this probably isn't for you.
There is some light incest in this manga. The only thing that physically happens is some kissing, but if that thing seriously squicks you out, then maybe you should avoid this. If it helps, you might also want to know that while they are related to eachother, they haven't been in contact since they were really young, so they are basically strangers.
If you have finished the 46th chapter, and you like the way that the story ended there, then DO NOT READ THE 47TH CHAPTER. I honestly wish I hadn't read the 47th chapter, because now it has me slightly miffed at the series. There's an author's note in the back of the Tokyopop versions that explains why the 47th chapter is like it is, but I honestly think that you should just stop with the 46th. It has a good ending.
