Having turned the tide of battle in Kyushu piloting the prototype Mikage mech, Keita Kawakami is quickly rising through the ranks of the military. With this new reputation comes missions to safeguard Japan's national security... or so he thinks. Instead, Keita receives an order from above to spearhead the development of a new powered exosuit model—a move that can only be the work of a rival faction that wants to see him sidelined. Little did they know this would lead to a battle that will announce the birth of a new hero to the world...