The story revolves around an isolated mountain village, steeped in ancient traditions, whose population of 1,300 starts dying in droves due to mysterious causes. Eventually, it becomes clear that vampires are attacking the town. 

A television anime adaptation of the manga, starring singer and actor Gackt, aired in 2010 on Fuji TV's Noitamina late-night time slot. The North American anime distributor Funimation simulcast the series on its website and will be releasing the series on DVD and Blu-ray in spring 2012.

Ono had previously written the original novels for The Twelve Kingdoms and Ghost Hunt, while Fujisaki is best known for drawing the Hoshin Engi/Soul Hunter manga.

Source: Mainichi Shimbun's Mantan Web