When Genetic manipulation , Technology , Military , Utopia , High technology weapons, Immortality , Myths and legends , Samurais , Vampires and Sex mix up , in just a perfect ammount , You`d probbably get Kurozuka. As i said , the storyline is not exactly something extravagant, but rather a perfect mix of scenarios already seen. The Graphics is pure perfection , such attention brought to details , and plenty of scenery , is just amazing. I admit i haven`t read many manga`s but this is certainly the best drawing i`ve seen . The fights are very well depicted , you can easily geta clear vision of what is happening.
The characters are "standard" , with few icons of great power , and a whole hierarchy underneath , well grouped into sides depending of their goals.
..And yeah , lot of sex , censored though , but it gives the characters "a human touch" :)
The length is just perfect , so you don`t get the feeling that some of the parts are too much , or that some of the story is cut, it`s all perfectly woven into a nice above-average speed development.
I recommend it strongly.