@degenerateafro
Actually, the first chapter seems to be a prophetic vision, not a flash-forward. See the later translations of chapter 2 for the mention of Chloe's ability being showing people their future.
So Blair did know about that intro (but probably never realized its origin or she later forgot), and those scenes from chapter 1 might not ever play out the same way.
Edit: I didn't pay enough attention before. It segued into a long flashback after she related her "dream", which is still a year away (fourth year since transmigration, while "now" is the third year.)