the intention of the whole narrative at the start being cut off was to show how relationships are shaped by the people you know etc but it's cut off since myungsoo thinks that simply taking pictures of them and seeing them a lot means he has a relationship with them. but he doesn't. his relationships are purely superficial and once his camera breaks, his relationships are "broken".
i couldn't expand it without contradicting a previous point.

(was there other questions I was meant to address?)