Started reading this a few days ago. Three thoughts, having finished the first two routes:
1) Every story with a sister heroine needs to have a "uh, no, she's my sister"
2) Miku's route is very well-placed. The first route and third route seem to be the heavier routes of the story. Miku's is still pretty serious, but the subject matter is comparatively lighthearted, and that makes it kind of refreshing by comparison. (I don't think any scene in the VN will top, "Does this mean I get a threesome this summer?"
It also reminds me of FSN's route system a little, in that even if the characters are starting from the same place, it still feels like they've grown a little across the routes.
3) The story makes a very good use of choices at the end of the second route. Characters repeatedly talk about Masayuki's naivete and optimistic outlook, and tell him that it gets in the way of actually understanding the situation. It's especially present in the second route, where a little skepticism probably would have resulted in a lot less hurt for everyone. And it's repeatedly stressed that she wasn't the type who ran ahead — she always followed after someone else. So at the end, when she's running alone, your choices are "believe that she can do it" or "it just isn't possible right now." And the optimistic feel-good answer is wrong. It gives you the bad end, because choosing it shows that you haven't been paying attention.
It feels very much like a pop quiz moment, where the game asks, "Have you been paying attention to the theme development?" That is how you do choices in games! Seriously, I think that's something I'm going to have to point to when VN choices come up.
edited 1st Jun '12 3:11:56 PM by Einander