New witches summoned from Gallia and Fusou join the 502nd Joint Combat Air Group, which was established as an elite unit. Judging that the time is ripe, Laru begins preparations for an all-out invasion operation, but Nipa falls into unprecedented poor condition and crashes by Lake Ladoga. In this dire crisis, a unit recovery team led by Aurora E. Yutilainen makes an appearance!? The highly anticipated second act of the prequel to the sensational "Brave Witches." "Unlucky" Katayainen soars through the winter battlefield!