After Transmigrating Into A Novel, My Sister Spoils Me Rotten

In the novel she had been reading, she had become a fake heiress who had to fight with the real heiress until her family was ruined and her life was in danger. Luna saw through the plot and just wanted to live a peaceful life. None of the expected family feuds, ostracism, or competition happened. Instead, the real heiress, who was supposed to be her rival, stood behind her, worrying about everything, and solving all her troubles. While others were torn apart by the battle between the real and fake heiresses, she was the only one who was favored and taken care of by the real heiress throughout the entire process.