We know each other well and don't doubt each other.
Stay together forever and never leave each other.
In the first half of her life, she protected him, hand in hand through wind and rain; in the second half of her life, he protected her, and we hope they grow old together in this life.
One-sentence copy: The turmoil of life and death that happened among the nobles in the royal palace, the separation and separation of a brother and sister.