First of all, this series isn't cancelled and it's didn't ended prematurely. It did ended properly with volume 7. It's just that the scanlator dropped the series, thus you can't find last volume (7) in English from net. Please note that the ending isn't rushed too! I know Chinese so I read volume 7 in Chinese.
Now to my review.. I will talk about overall.
I love this type of story. Main lead has something non-human inside him, normally people will goes berserk but he didn't.
Mikito is a good nice guy who sincerely want to protect. He went on a journey to search for a way
to return back to human. Because of his strong will, he didn't give in to feeding human, didn't go berserk, and even changed Zakuro, who wanted to control him, positively.
I enjoyed the series, it didn't disappoint me and I like the ending. There are many mangas I read that I gave up or put on hold half way reading it. Because they are not as interesting as the starting of story, and also didn't get me to keep reading it. But Kurozakuro did makes me want to know what'll happen next.