This series follows the daily lives of 4 vampires that live together in a European-style building: Kiyoi is the eldest who takes care of the others, Masakazu is a college student who gets information on criminal activities, and Ageha and Makoto both go to high-school (and tend to end up helping Masakazu whether they really want to or not). They fight against crime when the cops are unwilling or unable to do so. The series is based off of a shounen-ai manga published in B's Log. Whether you like shounen-ai or not, it hasn't been very obvious in this series and it may not be... the jury's still out on that.
Cast & Credits
As for casting and acting that was uhhh...cute is the only word that comes to mind. It's almost overly-cute and anime-like but still enjoyable. I didn't know any of the cast before watching this, and was satisfied with the acting I saw from them (mainly because it was cute).
Overall, I'd recommend this series to anyone who wants to watch a simple and short drama yet is not expecting much at the same time.