I Shall Not Lose. Political Marriage is a Lady’s Accomplishment

The region of Parsa in the state of Karana is jointly governed by two great houses: the Fullranet family, masters of magical power, and the Romano family, unrivaled in martial might. Each house has a daughter whose breathtaking beauty and extraordinary abilities mark her as the future countess. Annamaria Fullranet, known as “the Black-Magic Lady.” Rosaria Romano, known as “the Silver-Knight Lady.” Though childhood friends, a trivial incident in their youth shattered their bond, turning them into sworn rivals who clash at every turn. Then, Duke Jeremiah arrives in Karana. A royal with prodigious magic, he had served as a general in the capital’s Sorcerous Kingdom Army—only to abruptly resign and relocate to Karana. Rumors swirl: he’s here to find a bride. "Marry him, and I’ll rise as duchess, lifting Parsa to new heights!" both ladies think. As the two reignite their feud, Jeremiah reveals a secret. “My source of magic—the gem Smeraldo—has been stolen. I can no longer cast spells. Whoever recovers Smeraldo… I will marry.” And so begins the coldly calculating courtship battle between two noble daughters—purely for power, prestige, and Parsa’s future?! https://www.cmoa.jp/title/1101468050/