Kokoro wo Tozashita Koushaku Kakka to Konyakushita Hazu nano ni, nazeka Taisetsu ni Sareteshimattemasu! Hana no Kaori wa Koori wo Tokasu

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. Source: MU