With their new cutting-edge robot 'U-Ran' now complete, the engineers enter the World Robot Fighting Championship! Challengers from all over the world bring their best creations, to face down in a deadly battle of steel and cunning! Created by Masami Yuki and Tetsuro Kasahara, Volume 6 of ATOM: The Beginning introduces an iconic character in U-Ran, the young sister of the titular Astro Boy!