Toaru Hikuushi e no Tsuioku

A prolonged conflict exists between the Levamme Empire and the Amatsukami Imperium. During this time, the Levamme prince proposes to Juana del Moral, promising to end the war within a year. The Amatsukami learn of this and attack Juana's home to prevent the union. To secretly transport her to the Levamme capital, the San Maltilia Airforce employs a mercenary of mixed heritage known as a bestado. The pilot, Charles, agrees to the task, but the journey across the ocean into hostile territory becomes far more perilous than expected.