I will stop being the convenient older sister. ~For fifteen years, I've been told "the older sister must do it for her younger sister." I've decided to abandon my twin sister who has grown into a splendid villainous daughter and live freely myself~《◆I've created a separate serialized version◆》

"For the Sake of Her Sister" Without ever doubting those words from her parents. Illia Valenstein had lived for fifteen years. Under parents who doted on her twin sisters, her given role was to be the "older sister." She was the one who accepted her sisters' failures, bore their bad reputations, bowed her head, and protected them both. Eventually, her sisters grew into notorious villainess characters known throughout high society. And yet, Illia, as their older sister, believed that as long as she supported them, everything would be fine. ——Until the day she learned that even her own future had been sacrificed for her sisters. A marriage proposal came to her sister from a duke's family. And the condition thrust upon her was: 'The older sister Illia must not appear in high society.' The moment her family agreed without hesitation, Illia understood everything. She had not been protected as family—she had simply been used for their convenience. A story of how Illia decided to stop being the "older sister," abandoned her sisters, and resolved to walk her own path in life.