Saishuu Heiki Kanojo: Another Love Song

In a city under siege, fighter planes and bombers rain down destruction on Hakata, with the Fukuoka Dome engulfed in flames. Amidst the chaos, a mysterious light appears in the sky, intercepting enemy planes with its energy cannon. This enigmatic entity, known as another "Ultimate Weapon", is revealed to be Chise, a young girl who has been transformed into a combat device against her will. As she grapples with her circumstances and recalls memories of Shuji, the army continues to deploy her in battle, raising questions about whether this new technology is a friend or foe. This OVA explores a previously unexplored aspect of the series, uncovering a hidden truth.