Ash

You are Aurora(you can't change your name), you have been carrying a disease since you were born and never experienced the outside life. You have books to keep ko accompany and made you feel like you were there experiencing those things, one day you were 18 years old, when you're about to die, you suddenly woken up at a mysterious library, and there's this guy who introduced himself as Ash the bookkeeper and he is tasked to take you and let you experienced being inside your 8 favorite books.