Moon Phase?

So i just got this anime, Called Moon Phase, apparently it is about this little girl vampire :o but i know nothing else about this anime. I was wondering if it was any good and what other people thought about it. I am going to watch it though since i did get it already and it the was the value pack for the whole series. So i got it, since i didn't have anyone tell me which anime was good or not, can someone fill me in?