The next preview should give us an insight to Nanaka's past, at least a little. Looking back, that crow scene was actually creepier than I thought. I was describing that death scene from memory of older works, had no idea how close it resembled the meeting with Nanaka from ep 1. I'm kind of lost now. Tone certainly deviated from the general lightness of that ep, but it wasn't so obvious that we all picked it up.(5 weeks later...) Whether it was to simply grab out attention to Nanaka, or something more sinister will probably be left to interpretation.

As for the preview, it didn't look as scary as the one about the sakura dance, but more mysterious, especially the puzzled, late afternoon look.