Cain was the vampire responsible for turning Tatsuhiko Shido into a vampire, as well as erasing his past memories. A handsome, hedonistic, yet cruel individual, Cain has pursued Shido for the past few hundred years.    Cain and Shido were at one time lovers, but because of Cain's cruelty, Shido broke away from him and began his quest against nightbreeds. Cain, however, refuses to let Shido go, and is hoping for the day that he and Shido would be together again.    (source: Absolute Anime)

Shido Tatsuhiko is not only a private eye... he is also a vampire with no real memory of his past. Joined by Yayoi Matsunaga, a female government agent, Riho Yamazaki, an orphaned teenage girl working as his girl Friday and Guni, a little green imp, Shido must face demonic creatures known as Nightbreed. Meanwhile, Cain, the vampire who made him what he is now, is seeking him...
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(Source: Anime News Network)

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