0/6 is a fist-clenching coming-of-age story of a wimpy high schooler who finds his hidden self when a beautiful female automaton no.6 is delivered to his home by his indifferent father who is supposedly in America working as a researcher. His life becomes utterly chaotic with invincible no.6 whose ultimate duty is to protect no.0, but from what? He has yet to discover that there are frightfully destructive forces chasing him, and that his father sent no.6 for a greater purpose than just to beat up the back street gangsters who have always been bullying him around.