
Ok so this is my understanding:
She was a sickly girl reincarnated into a novel,become a princess with a short lifespan.
She was supposed to be the 'prince' that was killed but instead of her that 'prince' was just an imposter.
And her childhood friends thought that she is a boy when they were young(??????)
And they didn't recognize her as a girl(??????)

Who is the Male Lead?
Actually it was the Blond Magician but I still don't know it's just a rumor but he will help out FL tho
There's only a little bit romance in this story,

Maybe, yeah. But I don't think the romance will be the main plot. Right now she needs to awake her power, so her "sister" won't be able to keep claiming that she is a fake, and then find out who the sister really is and where she comes from to avoid dying again.
I think they gave her a romance focused moment in the beginning so she could be like "That's not my shit" and move on from the normal girl phase. It was also for her father to see that he is loosing his grip on her. He is no longer her main focus
Imagine Hinata and Yamaguchi being like that I think I might be blind(≧∀≦)
Funny thing is that's a real thing it's so cuteeee