The Ultimate Vampire Resource and Directory

There was only 6 episodes aired.Based on Kaori Yuki's short "Bloodhound". It looks like there have been some mysterious vampire-like murders going on, and who else does hyperactive, loud-mouthed Rion suspect but Suou, a devishly handsome worker of a male host club. (Well, along with everyone else working at the club.)
Cast:
Matsuda Satoshi - Suou
Komukai Minako - Kanou Rion
Sano Shiro - Tenran
Nobukawa Seijun - Tomoda Tomoyo/Daiana