100 year to meet you

Aquila Valentina Beauchêne is the daughter of Duke Beauchêne and one of the generals that defend Bellium against Devine. After five years of war, two countries decide to have peace by using a political marriage. Due to her position, Aquila get chosen to be sent to Devine and who is her partner except Prince kaiser, who was the head of enemy forces in the battle?! Can the two enemy live together under one roof without killing each other? is it even possible for them to be friend let alone lovers? Aquila gets a headache by only thinking about it...