Arne no Jikenbo

Arne Neutote is a vampire detective with strange powers, while Lynn Reinweiß is a noble girl who likes vampires. Their paths crossed with each other during a murder case, and then they decided to solve the case together. Lost and afraid, Lynn entered the city of vampires where no human lives and met Arne, the worst vampire she knew. A new crime begins, and the truth hides under the red moon.