Responses
So spoiler ahead.
She’s not technically from the modern world. She was reincarnated from his timeline into the modern world. That’s why she felt such a strong connection to his character when she read the book. Then she reincarnates back into his timeline and helps him become a better person.
I tried to like this story....I really did. But had to stop mid-way. And I have read many stories where the FL jumped into a novel. For this one though, the FL is from a modern world and her behaviors and actions are so annoying it's dumb. Like come on, you are trying to help the dude, but instead you didn't really do anything. I think it's just lame...so much potentials and the story could have been so much better for the FL character.