In a kingdom of cold stone and ancient bloodlines, Princess [Y/N] lives in a gilded cage of duty and courtly expectation. As political unrest threatens the crown, the King appoints his most lethal and imposing commander, Levi Ackerman, as her personal shadow. At twenty-five, Levi is a towering, 6’0” force of nature—a man whose silence is as sharp as his blade and whose loyalty to protocol is absolute. To the court, they are the perfect image of royal security: a distant princess and her icy, iron-clad protector. But behind the heavy oak doors of the citadel, a different story begins to unfold. What starts as a rigid, transactional alliance slowly fractures under the weight of shared danger and unspoken devotion. In a world where a single touch is treason, the line between duty and desire becomes dangerously thin. This is a story of a slow-burning fire fueled by iron and silk, where the greatest threat to the Princess isn't the rebels at the gate, but the silent knight standing right behind her.