身代わりの落ちこぼれ生贄聖女は敵国王弟に溺愛される ～処刑の日はいつでしょう？ え、なぜこんなに大事にされてるんでしょうか～

Arnots, a defeated nation, was presented with the condition "to give a saint to the enemy nation in marriage," and offered up his first princess, Sonia. However, Sonia was a fake saint who had only been used in place of her sister and did not have the powers of a saint! Wracked with guilt, Sonia told the truth to her future husband, Charles, the enemy king's younger brother, and asked him to forgive her country in exchange for her life, but he gently advised her, "Even if you are not a saint, I have no intention of punishing my precious bride." True to his words, no execution took place no matter how long she waited, and instead she was treated as a wife and cherished. Sonia was confused by the happiness that was beyond her rights, but since the arrival of Sonia, who was supposed to be a fake saint, the enemy nation became increasingly wealthy...?