Shuuji and Chise are third year students at a high school in Hokkaido. The shy Chise is finally confessing to Shuuji, and finally the two of them are starting to exchange diary awkwardly. One day, Shuuji tries to escape from a sudden enemy air raid on Sapporo. While desperately escaping from the air raid, Shuuji sees a scene that he could not forget for his life. He sees Chise, with a huge weapon looking as if it was part of her hand, shooting the enemy fighters down one by one. Apparently, Chise is the ultimate weapon with destructive power which is important for the war.

[Source: AniDB]

In the sky over Hakata city, fighter planes were flying and bombers are dropping bombs one after another. It became a sea of flames around Fukuoka Dome. At that time, a light appeared in the sky. In the shower of missiles, it intercepted enemy planes by its energy cannon. It was another “Ultimate Weapon”.

In the meantime, Chise was suffered from the fact that she’d been turned into a weapon against her will, and she was thinking about Shuji. However, the army continued sending her to the battle fields.

Whether another ultimate weapon is an enemy or a friend?

This OVA will reveal another truth that wasn’t described in TV series.

[Source: AnimeNfo]