Kousaburo Kuki is a no-nonsense man's man who's good with his fists, and with the ladies. Currently residing in the seedy underbelly of Paris, his best friends are prostitutes and his life seems uneventful -- that is, until a friend is brutally murdered and he finds himself entrapped in a twisted nightmare of conspiracies and creatures of the night known as vampires. With the CIA and other organizations after the woman he is sworn to protect, Kuki must risk his life to find the truth, lest he end up dead from a vampire's bite!
In ancient times, the great Mother gave birth to human beings to populate the Earth, but she also created a race of demons to be mankind's arch enemy, to teach them how to fight fear. In present day Tokyo, Shinjuku has been destroyed by a mysterious light, and someone -- or something -- is commiting terrible murders. The only hope for Tokyo's citizens is Tsunami Shijyo, a demon fighting stranger who will soon be up against the greatest evil the world has ever known...
Koshigaya and Komada are professors by day, but at night, they are Bio Hunters. Their mission? Hunt down people infected with the ellusive Demon Virus, and destroy it. Things become complicated when the two become entangled with the fate of Sayaka, a woman whose grandfather is a famous psychic. With powerful enemies on their trail, they must find Sayaka's lost relative to hear his prophecy, or die trying!
When evil overtakes the heart of man, it destroys his soul, changing him into a hideous creature of flesh and darkness. And where there is evil, there are Hyoi and Ryoi Kagezaki, humans who can morph into cats, known as the Dark Cats. In the present, a great evil is manifesting in a local high school, leading Ryoi and Hyoi to enroll and investigate. But the source of the evil may not be who they might normally suspect, and the consequences of the discovery may very well be deadly...
In the streets of Tokyo, demons run rampant, silently killing and possessing innocent citizens against their will. Meanwhile, in one local high school, the once ridiculed computer loving Akito Kobayashi has returned, armed with the knowledge to summon the greatest demon of them all, Oze, to destroy all of humankind. Along with Takehiko Kuki and Marika Kusaku, spiritual ninjas that have spanned centuries protecting the gods, one man must fight to stop the evil god from resurrecting, before it's too late...