In a world where social status dictates destiny, Lady Eliana of the prestigious Ducal House of Lumiere secures the coveted position of Crown Prince Alvin's betrothed through relentless training and dedication. However, her lifelong aspirations crumble when her younger sister Luna, captivated by the prince, demands to take Eliana's place. With their parents' support, the sisters swap roles, tarnishing Eliana's reputation in the process. Devastated, Eliana, in a moment of despair, offers herself as the sacrificial 'Dragon's Bride,' only to be unexpectedly rescued by the dragon Greed. As a gesture of gratitude for her salvation, Greed proposes a union with Eliana, who, seeking refuge from shame and death, agrees. Bound in a peculiar marriage, what extraordinary adventures lie ahead for the exiled noblewoman in the company of a mythical dragon?