Blood: The Last Vampire

BLOOD THE LAST VAMPIRE (ブラッド ザ ラスト ヴァンパイア)

Teropterids are evil beasts which pose as humans and live only to drink human blood. Fortunately for the human world there are groups dedicated to destroying them. A brooding and mysterious girl named Saya is the best teropterid slayer there is, and now, in 1960s Japan, she is sent to a U. S. army base which may be infested... (Source: ANN)