Set in 2017 a.t.b., this gripping side story unfolds amidst the turmoil of the Holy Britannian Empire's invasion of Europe. As the European Union faces imminent defeat, a special task force called “W-0” is formed, featuring the skilled young pilot Akito Hyuga. Leila Malkal, a former Britannian noble, leads the “Wyvern” Knightmare corps, which consists of brave Japanese teenagers. Their mission is perilous, with only a 5% survival rate, yet they charge into battle, driven by the hope of freedom and the dream of returning home.