The Blood Burns in My Veins by Megan Derr

The House of Ferro has dominated the city-state of Verona since its creation, made mighty by their magia del ferro, financial acumen, and ties to the imperial throne. The House of Ishikawa arrived on Verona’s shores a few years later, made powerful and wealthy by way of their rare, priceless magia d’acqua. A short time later, murder and vengeance exploded into a feud that has lasted for generations—and by decree of Hardegin-principe, will end now or else.

Royal decrees cannot so easily quell generations of hate and bloodshed, but ancient feuds cannot stop love. Determined to be together, young Ferro Carac and Ishikawa Arata decide to run away and leave their families behind. But on the night they depart, Arata is murdered, and Carac is wrongfully blamed for it, betrayed by everyone he trusted.

Fifteen years later, Carac is long dead of disease while in prison, and Verona is abuzz with nervous excitement over the betrothal of Ferro Selinah to Ishikawa Naoki. Unhappy with the pending marriage, Naoki spends most of his time drinking and sleeping. On the way home from a bar one night, accompanied by the sister come to drag him home, they are attacked by a bandit—and saved by an intriguing man who goes by the name of Dante …