Night Walker: Mayonaka no Tantei

In the world of Night Walker, Tatsuhiko Shido is a private investigator with a secret: he is a vampire with no recollection of his past. Joined by Yayoi Matsunaga, a skilled government agent, Riho Yamazaki, a resourceful teenage girl who serves as his loyal assistant, and Guni, a mischievous little imp, Shido must confront the Nightbreed, malevolent creatures that threaten the city. As they delve deeper into the darkness, Shido's greatest challenge may be Cain, the vampire who created him, who is now seeking him out.