Part of the Ai to Meiyo no Tame ni Series (愛と名誉のためにシリーズ), also called the "Love and Glory" series, which goes as follows:

1. Kono Ai wa Kizutsukanai
2. Tsubasa o Oranaide
3. Eikyuu no Kikan
4. Kono Yoru ga Aketara

from fictiondb:
Fresh from grueling years of pilot training, Alyssa Trayhern couldn't believe the navy was about to crash-land her career. Butwhy else assign her as copilot to cocky jet jockey Clay Cantrell? Aly vowed to defy Clay's cruel hatred of her Trayhern name. Then rare glimpses into his vulnerable soul shook her rigid defenses ... and left her longing to surrender to the heady onslaught of bittersweet desire.