Shuumatsu Nani Shitemasuka? Mou Ichido Dake, Aemasuka?

Five years after a battle at Corna di Luce on Sky Island 11, the situation has deteriorated. Following that battle, the Elpis Mercantile Federation accidentally released two beasts—Materno on Sky Island 13 and Croyance on Sky Island 39—leading to the destruction of both islands and significant loss of life. Feodor Jessman, a 4th Grade Officer whose step-brother led the Federation, trains on Sky Island 38 with the aim of advancing in the Guardian Wings Military. While skipping training to buy doughnuts, he meets a Leprechaun girl named Tiat Siba Ignareo, who asks him to forget her. Later, Feodor is assigned to care for visitors from Sky Island 11, among whom are Tiat, Lakhesh Nyx Seniorious, Collon Rin Purgatorio, and Pannibal Nox Katena. Unbeknownst to them, their meeting coincides with Croyance's approach to Sky Island 38 and a hidden conspiracy within the Guardian Wings Military.