While W-0 is away, Leila and the remaining crew at base find themselves surrounded by Britannian Knightmares. Piloting the Vercingetorix, Shin Hyuuga leads the enemy charge, having usurped the position of Grand Master in the Knights of St. Michael. With her core members unavailable, it's up to Leila to protect her comrades, but this may be much tougher than she realizes: a spy lurking among them is finally ready to reveal himself.

Left with no choice but to surrender, Leila arranges a meeting with Shin in order to ensure the safety of her squad. But as negotiations begin to fall apart, Akito and an unexpected ally return in the nick of time to turn things around.

Short extras of the anime included in each of the six Blu-ray volumes of Amagami SS+.

The Walpurgis Royal Academy of Machinart was founded alongside the development of "Machinart," machine magic capable of giving life and intelligence to mechanical dolls subsequently called as "automaton." Its aim: train skilled puppeteers to control the automatons, as militaries across the globe have begun incorporating Machinart into their armies. After miserably failing the academy's entrance exams, Raishin Akabane and his humanoid automaton Yaya must defeat one of the top one hundred students to earn the right to take part in the Evening Party, a fight for supremacy between puppeteers using their automatons. The last one standing is bestowed the title of "Wiseman" and granted access to the powerful forbidden arts. Thus, Raishin challenges Charlotte Belew and her automaton Sigmund to a duel, but before they even begin, Sigmund is attacked by other students. After saving his opponents from their assaulters, Raishin cancels the duel but is forced to search for a new way to gain access to the Party. Driven by the tragedies of his past, Raishin fights alongside Yaya to rise to the top and claim the title of Wiseman. [Written by MAL Rewrite]

In the far future, humans abandon a devastated Earth and traveled to outer space. However, due to unknown phenomenon that prevents them from traveling into space, humanity returns to Earth only to find it inhospitable except for Japan. To accommodate the entire human population, pocket dimensions are created around Japan to house in the populace. In order to find a way to return to outer space, the humans began reenacting human history according to the Holy book Testament. But in the year 1413 of the Testament Era, the nations of the pocket dimensions invade and conquer Japan, dividing the territory into feudal fiefdoms and forcing the original inhabitants of Japan to leave. It is now the year 1648 of the Testament Era, the refugees of Japan now live in the city ship Musashi, where it constantly travels around Japan while being watched by the Testament Union, the authority that runs the re-enactment of history. However, rumors of an apocalypse and war begin to spread when the Testament stops revealing what happens next after 1648. Taking advantage of this situation, Toori Aoi, head of Musashi Ariadust Academy's Supreme Federation and President of the student council, leads his fellow classmates to use this opportunity to regain their homeland. (Source: Wikipedia)