Item 2: Familiarity or Discouragement?
In the shot of our EH using her feet to toe him, causing him to brush her feet away, and in the other wedding shot again when he turn away from her when she reach out to check his elbow.....hmmmm, either he is trying to discourage her attentions(? unlikely, our Hye will not choose to pay attention to someone repeatedly if he is not responding) or because he is so famliar with her that he behaves in a quick manner to avoid being captured on film.
Now we know that our GY has always been the gentleman with the ladies around him, although sometimes playful, but never rude or brusque in that manner with Hye.
I can only guess that our GY may be the "da nan ren" type, with his "woman", he will be his true self, with others, who are mere friends, he will be his charming and suave self.
That could be why he has stated that he needed someone mature, who will be able to take his insecurities, like our Hye, who has steadfastly taken his somewhat 'rude' attentions in the intention that it was meant to be - don't be captured on film, and not at face value.
Anyway, let's savour the romance of our young lovebirds at work, hiding from the world, but not from each other. Te amor GYEH!
Cheers!