Tenrou: Sirius the Jaeger

Vampires have penetrated Tokyo in 1930 and are consuming its gullible residents. The city's officials decide to employ the Jaegers—a bizarre, multifaceted collection of people assigned by the V Shipping Company to find vampires all around the world—as the number of victims keeps increasing. The Jaegers fight the vampires with the same ruthlessness displayed by their enemies while concealing their identities by carrying musical instrument cases. The Jaeger's best warrior, Yuliy, is the only one to have survived a vampire invasion on his hometown. He collaborates with his team to help the police in Tokyo deal with the vampire issue by drawing strength from his werewolf blood. The Jaegers are engaged in a conflict with the vampires over the legendary Ark of Sirius, although seeming to be assisting the police. Yuliy and his pals must find the relic before the vampires can use it to further their evil agenda since it has the ability to alter the course of the planet.