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

Both my parents had always only loved my sister and I had no place at home. I lived my life believing that as long as I worked hard, I would someday be loved. One day, my sister received a royal order to marry a margrave who was rumored to be ruthless. My father said to me, "You will marry into the margrave's territory instead. But on the way, the...