The following content is intended for mature audiences and may contain sexual themes, gore, violence and/or strong language. Discretion is advised.
Luna was one day saved by a man who trained him to become a killing machine, since then, our hero does mission for that guy organization as an assassin. One day he is given a mission which implies 'latching' onto a private detective by the name of Nishina Tougo with the objective of killing a scientist who created some dangerous drug...