Kyosuke''s normal life shatters with the knife''s sharp entry into his heart. Why? Why did mom do it? As Kyosuke recovers, his body reveals a dangerous secret... a secret proving his past is a lie... His search for answers only reveals more questions when he''s attacked by assassins, discovers the existence of an unknown sister, and learns that his savior Maya Misaki has been kidnapped by Kirihara Heavy Industries! with the mysteriously helpful Shiro Mibu, Kyosuke must set out to find Maya, his missing sister Runa, and the truth behind his ability to transform into the powerful SoulTaker!! Their path will be anything but easy since both Kirihara Heavy Industries and mutants from the Hospital have their own plans for Maya and Runa and they''ll use as much violence as possible to prevent Kyosuke from learning anything!