"Omae ga Kawari ni Shine" to Iwareta Watashi. Imouto no Migawari ni Reikoku na Henkyou Haku no Moto e Totsugi, Shiawase wo Teniireru

Both my parents always favored my sister, which made me feel unwelcome at home. I grew up believing that if I worked hard enough, I would eventually earn their love. One day, my sister received a royal decree to marry a frontier count known for his ruthlessness. My father, who adored my sister, turned to me and said,