Rika Morinaga

In a mythical realm, the Imperial Knights harness a substance - Aer - to protect humanity from monsters. When the Aer somehow begins changing, causing monster attacks to increase, two recruits must uncover the truth behind the dangerous mystery.

The Neuroi, a large and dangerous alien race, still roam parts of the world leaving destruction in their path. The Strike Witches-a group of girls with extraordinary powers, formidable weapons, and advanced aircraft appendages-have made great strides against the Neuroi. But the war against them still rages on.