(1) I hate estimating anime character ages. Actually, it’s impossible. So I’ll just say Natsuki was about seven when the car went off the cliff. Why? Because that’s a good number. Unless someone has a more solid ref or better arguments as to why one age is better than another (she’s pretty darn young there, I mean–though I don’t exactly have a screenshot of that scene and don’t remember what ep it was in).
However, I realized that working out the time between that event, +3 months coma, and up to the point of meeting Shizuru is more problematic. 7 -> 14 (13 being roughly the age middle school would start)
Seven years of hanging out by herself is an extremely long time for a child. Not only that, but she was certainly orphaned young enough that the state wouldn’t dream about sending her out on her own (no matter what money is involved–I’m assuming a lot that her mom had a trust, though). Foster care? Natsuki really never talked about such things in the anime. What a pain in the ass. Special arrangement? Ugh. (Oh, wait, I feel an idea coming on…*FD)
(2) Easy to write around this, unless I wanted to complicate it via (1). Oops, my finger just cramped thinking about that.
(4) Flashbacks? Hmm. Formatting issue.
(5-6) Got a good deal of material to work with concerning the Japanese schooling system. Happily, as someone reminded me, Fuuka is special, so some exceptions
are okay in order.
(I might be outlining Shizuru’s backstory a bit too detailed, but c’mon… she didn’t get any in the anime.)