The Blossom and the Firefly by Sherri L. Smith

Japan 1945. Taro is a talented violinist and a kamikaze pilot in the days before his first and only mission. He believes he is ready to die for his country...until he meets Hana. Hana hasn't been the same since the day she was buried alive in a collapsed trench during a bomb raid. She wonders if it would have been better to have died that day...until she meets Taro.