Description:

Shirley, the daughter of a frontier count, is mistreated by her family every day. When her sister-in-law tries to kill her, she ends up running away to a hostile neighboring country. She isn't suppose to be in enemy territory, which is rumored to be "vicious and cruel." But… there is no place she can return to. At a loss, she receives a proposal to marry Duke Oliver, who is a knight of the enemy kingdom! (Source: BookLive, translated)

Alternative Titles:

召使い令嬢は国境を越え、敵国の公爵騎士様に溺愛される, Meshitsukai Reijou wa Kokkyou wo Koe, Tekkoku no Koushaku Kishi-sama ni Dekiaisareru