Oogi Takaya is a street-smart high school student, dedicated to protecting his best friend Narita Yuzuru. The two are wrapped up in an ancient war of darkness and tragedy, begun during Japan's chaotic Warring...

To control the heart and mind of people, 23 orphans underwent human experiments for a drug called "Grim Reaper." Now, those guinea pigs are scattered throughout the underground world.Issei, who is fragmented by...