Episodes 1-13 of the first series of the Japanese anime about a boy who is brainwashed and turned into an assassin. Zwei (voice of Miyu Irino) is kidnapped by the elite assassination gang, Inferno, after he accidentally finds himself witness to one of the group's hits. The gang use technology to wipe his memory and train him in the art of assassination. However, as Zwei begins operations and comes into contact with Ein (Ayahi Takagaki), a beautiful fellow assassin with a will of iron, the boy begins to question his past and imagine a different future. Episodes are: 'Awakening', 'Training', 'Practice', 'Assassination', 'Moment', 'Conflagration', 'The Past', 'Sudden Change', 'Name', 'Finale', 'Succession', 'Ghost' and 'Camouflage'.