Manga Like Konyakusha ni Sokuhi to shite Riyou Sareru kurai nara Majutsushi-sama no Houshou to narimasu

Amelia, the daughter of a marquis who has been working hard to train to become a crown princess, is told by her fiance, the crown prince, that she has met the man of her destiny. What's more, he wants her to become the crown princess and be a concubine, so it seems he's trying to push the duties of the crown princess onto her! Wanting to amicably avoid being used, Amelia plans to marry Loire, a magician who became a hero after saving his country from a difficult situation in war, as a reward. When she speaks to him directly, he says, "Try your best to woo me," and the negotiations are successful! Aiming for a loving contract marriage, she begins to visit Loire, but...!? A doting love fantasy between a troubled magician and a serious young lady ♡ (Source: Ichijinsha, translated)