Zutaboro Reijou wa Ane no Moto Konyakusha ni Dekiai Sareru

Marie, the second daughter of a financially struggling noble family, is neglected by her parents and overshadowed by her older sister, Anastasia. During her birthday celebration, Marie encounters Count Kyuros Granado, who instantly develops feelings for her. However, a miscommunication leads the count to propose to Anastasia. Following a tragic incident, Marie ends up marrying the count instead.