There's No Way I'm Going to Die If I'm a Fake Daughter.

[System + 1v1 + dual heroines + slightly yandere + (little sadism)] When Luo Li woke up, the system in her mind told her that she had been knocked out of the book by luck. There was a fragrant and soft big sister beside her who took care of her in every detail. Luo Li couldn't help but sink in. At this moment, the big sister ran away and the real daughter came back. But as things progress, something seems wrong? Is this part of the plan? Not good! Big sister, why have you become such a good kid? Well, after writing it, I found that the title of the book is not suitable, but I can't change it, so the book is also called: "I, a Loli, Became My Sister's Feeder" or "The Tall Royal Sister is My Little Pet" (The introduction is too weak, please move to the main text) (It's a ball)