My Enemy... is my Life Savior

They say debts are repaid in gold, but in our families... debts are paid in souls."
They were never far apart, yet they never lacked a moment of clash. Alfredo and Rona grew up together in two royal houses that met only in friction. To him, she was a heavy burden inherited from his lineage; to her, he was a chain of arrogance strangling her freedom.
Between their parents lies an ancient "Blood Pact." Her father was the savior of his mother, and his father saved her mother. While the elders exchanged words of gratitude and grace, the children exchanged fires of hatred and defiance under the same roof.
But the game has changed.
To unify the kingdoms and complete the "return of favors," the kings have decreed a lifelong marriage pact. The two arch-enemies find themselves in a confrontation they never anticipated. They must not only live together but also become the symbol of unity for two kingdoms that were at war for a thousand years.
In this story, marriage is not the end of the war-it is just the beginning. And as the fires rise, each will discover that the person they wished to defeat their entire life is the only one prepared to be their "savior" at the ultimate moment.