Soul Forging Sun: the Swordsmith's Gentle Cage

He is the best swordsmith in the world, and she is the daughter of an enemy. When the flame of revenge meets the cage of tenderness, when the blood feud meets the love of children, how should the soul-forging choice be made? Every sword is engraved with hate, and every encounter is engraved with love. In this world where the setting sun is like blood, who can truly escape the prison of fate?