Toaru Hikuushi e no Tsuioku

Koroku Inumura's first Hikuushi series.

Charles, a mercenary pilot of the Levamme Imperial Air Force, received a secret order. "Fly 12,000 kilometer across the sea in the middle of the hostile territory and send the Princess securely to the main land." He fought against a devastating number of fighters and overwhelming battleships to protect Princess Fana. This is about a forbidden love between an orphaned pilot and a girl with an unchangeable destiny.

(Source: MAL News)