Eris no Seihai

Constance Grail is the only child of the renowned Grail family, whose motto is "Be you sincere," and at 16, she is the living embodiment of this motto. Constance becomes engaged to help her father pay off his debts, although she had always hoped to marry for love. Nevertheless, she resolves to go through with the marriage for the good of the family. During a ball hosted by a fellow noble, Constan…