|*Hello from Sid and the Critique Club*
A candid capture that meets the challenge well.
You have captured a moment that most of us nosy people have been intrigued by at some point in our shared curiosity of people watching. The essence of your image is the mystery of the moment, as you say, are they arguing or loving? It is this very uncertainty that makes your image so appealing we can only see his face which gives nothing away except intensity of emotion. The ladies stance could be either defensive or flirting, it looks as though she may be smiling but we can't be sure and so the mystery, fortunately, remains.
Although you have done some correction to straighten it out it still feels in need of further straightening it leans a little to the right. The scene as a whole is quite distracting but the main moment is so intense and captivating it overpowers any other distractions. Having said that, I think the notice above the doorway would benefit from some dodging to subdue it.
Well observed and captured, Sid