Something is kinda bothering me about Sanae's expression. She's 17-18 in the games, if I remember correctly, doesn't seem any younger, yet isn't paying attention to what's happening (molestation, IMHO).
Her eyes kinda look like Shou's in one of gaooo's doujins, after her mental damage...

Molestation? I, at least, see a girl helping another with dressing up a kimono, which I read that its hard to put on. Marisa in the other hand is blushing for whatever's sake (though I admit that I myself would blush due shyness) and Sanae just seems delighted with the kimono or Marisa in the kimono, or so me thinks.

Sanae's looking at the Marisa's reflection in the mirror, probably just happy at how Marisa looks.

Reimu's checking to see if Marisa knows how to wrap a sarashi yet.

It is very a nice picture but I have to wonder why Reimu's so short.