A superb love romance that crosses the border between a strict duke knight of a hostile country and a dedicated daughter! 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 in a neighboring country that is hostile to her. She is not easily allowed to return to the hostile country, which is rumored to be "vicious and cruel." At a loss, she is proposed to marry Oliver, a duke knight of the enemy country! 敵国の厳格な公爵騎士×ひたむきな令嬢の国境を越える極上ラブ・ロマンス！ 辺境伯令嬢のシャーリーは家族から虐げられる日々。ついには義理の妹に殺されそうになり、敵対している隣国に踏み入ってしまう。「極悪残忍と噂の敵国、容易には帰してもらえない。それに…帰る場所もない」途方に暮れていると敵国の公爵騎士・オリバーとの婚約を提案されて!?