Document: Fang of the Sun Dougram

Reinhard von Müsel and Yang Wen-li return to their respective homes, one victorious and the other defeated. While Reinhard earns the new name Lohengramm, Yang and his friends celebrate some welcome news.

For the past 150 years, humanity’s two greatest nations have been deadlocked in a meaningless war. In what is hoped to be a miraculous victory, the Alliance embarks on a battle to break through the Empire’s frontline. Like many other “decisive” battles, this can only end in disaster; a sentiment shared by Imperial nobleman Reinhard von Lohengramm and Alliance Commodore Yang Wen Li, both of whom realize how to turn the fight in their favor. And while the tides of war may never change, these two men must rise to the occasion, solidifying their place in history as heroes.

The side story takes place in 2017 a.t.b., between the rise of the “Black Knights” organization and the return of the supposedly "dead" Zero. The setting is in Europe, where the European Union (E.U.) allied nations are being invaded by the overwhelming forces of the Holy Britannian Empire. On the verge of defeat, the E.U. army forms a special unit known as “W-0″, of which a young pilot named Akito Hyuga is a member. Leila Malkal , a former Britannian Aristocrat comes to the E.U.'s aid, commanding the “Wyvern” Knightmare corps comprised of Japanese teenagers. They recklessly plunge into a battlefield, where the survival rate is extremely low, at about 5% only. They fight for their freedom and for a "home" to which they can return.

The Ark Fleet has been destroyed, and a significant number of the enemy's troops have been wiped out due to its crash landing. As the remaining forces of the Holy Order of Michael regroup in order to launch a final assault on Weiswolf Castle, the wZERO unit, along with their new ally Ashley Ashra, stand ready to intercept them. Meanwhile, with his Geass out of control, Shin moves to erase his younger brother's existence once and for all. But Akito, having promised Leila that he will come back alive, refuses to accept such a fate, and the two clash in their final battle.

The story focuses on the exploits of rivals Reinhard von Lohengramm and Yang Wen-li, as they rise to power and fame in the Galactic Empire and the Free Planets Alliance, respectively.