Responses
Pretty much. But it's not that all the characters die, it's just that the FL's favorite characters die because of the red haired prince and the novel's heroine. The original Villainess talks to our FL in what appears to be a dream and tells our FL how she can prevent herself from dying of the disease. The explanation of how the FL can cure the disease is a bit weird, but it all comes down to the FL having to recover a 100 memories that belong to the original Villainess.
Now the FL has decided to recover those memories but also meet her favorite characters, so she can prevent them from dying.
So hold on, She falls into a Novel where all the characters die? Then the original Villainess talks to her and says she needs to change her destiny? I don't know if it was just me but I'm a bit confused.