LEGION is a historical fiction action manga based in the Muromachi Period of Japan. The story follows Lochi Sengoku as he dreams of becoming a great samurai. However he can't do it alone, with the help of his brother Eiji they set off on their journey. Along the way they meet Gotsu, a living man-child but an excellent swordsman. They then meet Ishiro, a childhood friend of Eiji. Followed by Obuhiro and Niihama. These 6 are an infamous group in Japan, what is this group called. The Legion.