I Will Survive As The Extra Character!

"Are you sure you don't want to greet the prince?" I looked at the heroine, whom I got close to, stare at me pleadingly and wants me to accompany her in meeting the prince but hell to the no. I hate the prince, and he seems just like how he was prescribed in the novel! "Please?" I smiled gently at her and held her hand, her eyes immediately lightened up at this and thought that I gave in but... I value my life, you know? So... "You can do it, Aurora!" I will cheer you on, heroine! I immediately left her to where she is and disappeared into the crowd, hearing her calling my name but I didn't look back since I might change my mind if I saw her looking helpless. The flag for meeting the prince is a big NOPE. I am just an extra, and I will survive this damn novel! Whatever it takes! - - Hana was just a normal high school student who loves to read, and her favorite at the moment is a novel titled "Lovers in Bloom" wherein the heroine has two powerful male leads chasing for her. She was immersed in the story and always waited for updates, but before she could read the end of the story, she died. She woke up, feeling weak, in an unknown place and was greeted by an unfamiliar face. She slowly realizes that she was in a body of an extra character who will die in the beginning for her sister's development! The weak and youngest daughter, Eristheria Holstead! Now, she needs to avoid her second death and somehow help with her sister's development without her dying in the process. She also wants to witness how the heroine will fall in love with the duke, just like in the novel! She thought that since she knows the novel, it will be easy for her to accomplish this small feat but why is the plot changing?! Why are the side characters showing up more than the main characters?! What's worse is that the main characters became the extras?! What is happening?! Disclaimer: photo used for the cover is an unknown artist. I do not own the cover.