Ok that was... a little confusing but for anyone who might not understand, I think that she was living her second life (without her past memories) until her sister pushed her down the stairs, which she then unlocks her past memories and finds out that she was living in the world of a book she read in her past life. (I hope that makes sense)
Lady Adrianna isn't just a noblewoman, she's the side character in "Ramona's Tale," the favorite novel of an ill peasant girl who died tragically young. This is her second chance at life, and she's not reliving that tragedy! An evil stepmother's not gonna stop her, and Rian slowly gathers handsome companions along the way... the calculating imperial prince, the friendly count, the mysterious and brooding demon prince. After all, she is determined to live a long, healthy, and wealthy life!