My Best Friend Is The Real Daughter Of A Wealthy Family?! (wondernovels.com)

Synopsis: Yu Linghuan wakes up to a shocking revelation—she’s a supporting character in a “switched-at-birth” novel. Her role? To grow jealous of her sworn sister, Meng Xin, after she’s recognized as the true heiress of a wealthy family, and ultimately sabotage their bond, leading to her own tragic end. But Yu Linghua…