The Oath of Shadows [KTH ff]

In the royal courts of Kim Kingdom, three princes stand divided by ambition, duty, and secrets. Among them, Prince Kim Taehyung longs to break free of the palace walls, never expecting fate to bind him to an oath that will change his life forever. When Seo Y/N of the Seo family, a sworn warrior raised in an ancient tradition of loyalty, defeats the prince in battle, she pledges her life and blade to his cause. Her blood-oath seals a destiny neither can escape. But as shadows gather over the sacred Dome of Jeyrun and whispers of the Black Vortex threaten to consume the kingdom, Taehyung must learn that an oath is more than a vow — it is a chain of honor, sacrifice, and power. In a world where every promise carries a price, can loyalty survive the storm of shadows?