婚約破棄は自業自得 ～裏表がありすぎる妹はボロを出して自滅し、私に幸運が舞い込みました～

婚約破棄は自業自得 ～裏表がありすぎる妹はボロを出して自滅し、私に幸運が舞い込みました～, Konyaku Haki Wa Jigoujitoku: Uraomote Ga Ari Sugiru Imouto Wa Boro Wo Dashite Jimetsu Shi, Watashi Ni Kouun Ga Maikomimashita

A fateful turning point arrives for a pair of twin duchess sisters—one earnest, the other arrogant—in this enchanting romantic fantasy set in another world. Sylvie and Annette were born into nobility and renowned as beautiful twin sisters. But while the older sister Sylvie is graceful and upright, her younger twin Annette hides a haughty nature—deriving satisfaction from looking down on others, even Sylvie herself. “I want to be engaged to someone everyone envies…” So when Crown Prince Gerald returns from studying abroad, Annette seizes the chance to approach him, eventually securing a position as his fiancée. Fed up with her sister’s conceit and obsession with status, Sylvie watches from the sidelines—until a misunderstanding on Gerald’s part puts Annette in a serious bind… This is the story of a younger sister consumed by her need for validation and the older sister who forges her own path to happiness through strength and grace.