A romantic fantasy about a cold-hearted duke with a closed heart and a brave, but misfortunate girl! In place of her half-sister, Countess Alicia Marino, who is unable to use magic as she does not possess the blessings of spirits, marries Joel, who is rumored to be a cold-hearted duke. Joel has a cold attitude toward Alicia, who is rumored to be selfish and man-crazy, but contrary to the rumors, Alicia is hard-working and kind-hearted, and Joel gradually opens his heart to her. https://www.cmoa.jp/title/283834/

Everyone recognizes my little sister as a "saint." But to me, she might be a "devil." Everyone praises my little sister, who attends church every day and actively does charity work, calling her a "saint." But because of this, our finances are always in trouble. My sister has donated all the money I've saved to the church. Then a handsome man appears, and he says he's an emissary from the kingdom, looking for a saint. Please, please, take my little sister with you. Right now! (Source: Kodansha, translated)