Huh. Didn't know you had a page set up for it. Guess someone's been busy...
Anyway, in light of
I say...well, I still say it could go either way based on your preference. If it were up to me, though, I'd write from Michi's perspective first. It seems like he has a finger on the pulse of the plot (from what I can gather, at least), so his perspective on things might offer more clarity and narrative direction than Chang's. It could also be a chance to develop his character in a new way almost immediately, based on his thoughts and interactions.
Still, I find Chang very interesting. If she really is a Stepford Smiler
, then writing from her perspective first might give readers an insight to her depths...though how early you want to reveal that she's more than what she seems is something you've probably considered.
Well, that's how I see it, at least. Doubtless you've got this thing all planned out, so I don't have much of a reason to doubt you. Whatever way you decide to take it, I'll be rooting for you.