Yeah. I can't say there would have been anything that original in the manga. In general few vampire stories seem to introduce anything truly original or novel. But as far as execution (of the old elements) goes, this isn't bad at all.

Moka's voice in the promo sounds softer than I'd have expected based on the manga. While she is something of an airhead for sure, she's still not nearly worthless. But I have a feeling they are going for a really vast contrast between Moka with the rosary and Moka without the rosary.