Shuumatsu Nani Shitemasu ka? Mou Ichido Dake, Aemasuka?

Five years have passed since the battle at Corna di Luce on Sky Island 11, and the situation has only continued to deteriorate. Roughly two days after that battle, the Elpis Mercantile Federation accidentally lost control and unleashed two Beasts: Materno, the Fifth Beast Who Spreads Widely, upon Sky Island 13, and Croyance, the Eleventh Beast Who Remains Rooted, upon Sky Island 39. The outcome was catastrophic—both islands ultimately fell to the Beasts, and countless lives were lost, including many belonging to the Elpis Mercantile Federation itself. Five years later, Feodor Jessman, a young 4th Grade Officer whose step-brother stood at the head of the Elpis Mercantile Federation attacks, spends his days training on Sky Island 38, hoping to climb through the ranks of the Guardian Wings Military in pursuit of a mysterious goal. One day, while skipping training to buy doughnuts, he crosses paths with a young Leprechaun girl named Tiat Siba Ignareo, who, after a brief conversation, inexplicably asks him to forget her. The following day, Feodor is assigned to serve as caretaker for a group of visitors from Sky Island 11. As they arrive, he is astonished to find Tiat among them, alongside Lakhesh Nyx Seniorious, Collon Rin Purgatorio, and Pannibal Nox Katena. Neither of them realizes that their meeting will change the very fate of the Sky Islands: Sky Island 38 is set to come under attack by Croyance, which even now steadily advances from Sky Island 39, while a secret conspiracy lurks in the depths of the Guardian Wings Military.