MoonPhase

Photographer Kohei Morioka, while on assignment for a magazine devoted to the occult, enters a dark castle in Germany where he encounters a young vampire girl named Hazuki who tries to turn him into her servant. While Kohei doesn't succumb to Hazuki's will, he does set her free from the barrier keeping her in the castle. He is surprised to find her living with him in Japan.

Super sadly this is the only one of its kind