The Villainess Is Stuck Under The Heroine's Shadow!

One day, I woke up and found myself as a character from my favourite novel! Except I'm not the heroine nor the villain but the Heroine's sister that was always under her shadow! She even had a miserable ending of dying trying to save her sister! I'm not dying for anyone! I'm going to continue my life living happily without a care in what people think about me!