The Heiress: Unrivaled

Lu Zichen is the legitimate daughter of the Lu family who manages the household. Her younger sister Lu Zixi, a modern soul transmigrated into the past, clashes constantly with her determined third sister Lu Zimu. Lu Zixi, leveraging her modern identity, repeatedly challenges Lu Zichen but keeps failing, so she tries to seduce the Crown Prince, Lu Zichen's fiancé, to achieve social climbing. Knowing the Crown Prince and her sister will not let her go, Lu Zichen proposes marriage to Prince Murong Qingyu, who once saved her, to save her life. Her third sister marries the Emperor for status, and the three women secretly compete for dominance.