Henkyou no Shishi wa Rurishoku no Bara wo Dekiaisuru

Salisha was adopted by a count because of her beauty, and raised as a potential marriage candidate for the crown prince. But the Philippe the crown prince chooses Elena, Salisha's friend, to be his bride. On the day of the announcement of their engagement, she couldn't help but watch the two with a faint feeling of loneliness. When they were attacked, Salisha tried to protect Philip and Elena, only to be injured in the back, and she is left with an indelible scar and a broken heart. Suddenly, Cecilio Ahamas, a frontier count 10 years her senior, asks her to marry him.

"Why would a man I've never met ask me to marry him?"

She was puzzled, but she could not help but notice the clumsy kindness and the boyish expressions of the taciturn man, and Salisha gradually becomes attracted to the idea of marriage. She wants to stay by his side forever, but if he sees her hideous scar, he will surely dislike her, as the day of the wedding gets closer and closer... (Source: Shufu-to-Seikatsusha, translated)