It looks more like two photos placed over one, with the photos being from Gensokyo. Look at how Hatate's leg gets cut off outside the white edges.
and the blurry ones being from the outside world; must be so. I wonder whose hand that might be, though, I don't think it's the typical going-through-4th-wall viewer hand, considering the lower left panel it could be Maribel or Renko's hand, of course.
Anyway this picture is already one of my favorites from abo, probably because of Aya, Momiji and the beautiful scenery in general. I think abo simply draws the best of the three tengu :)