This high-speed flying shooter features young girls, who with wings on their back, must fight the "Blanka," mysterious flying entities that suddenly appeared one day.

Wars between nations are no longer conflicts between people; rather, they have become struggles for survival as humanity fights an all-new enemy.

Unidentified flying objects referred to as Blankers have suddenly appeared, and the only weapon powerful enough to defeat them is the Held System.

Only a small number of exceptional young women are capable of operating Held Systems, and they have become known as Frauleins.

Frauleins are now humanity’s last hope… If we don’t fight, humanity is doomed.

But fighting comes with a price that some may not be prepared to pay...