Phantom The Animation

A Japanese traveler witnesses a killing by a young assassin called Ein and falls into the hands of Inferno. Stripped of his memories and renamed Zwei, he is trained to serve the very organization that destroyed his former life.

Working beside Ein brings the two assassins closer, but their growing connection exists under constant control. As traces of Zwei's identity begin to matter again, obedience becomes harder, and the possibility of escape grows increasingly dangerous.