Street photography takes many forms and is done for many reasons. This shot looks like a private eye tailing one of the two, as if to document an illicit love affair. The subjects certainly look like they aren’t aware of anything around them, much less the camera. And the processing just adds to the feeling of someone hiding behind a mailbox, peeking above it to get the shot.
There’s a fair bit of street photography in our pool, and I encourage you to get out there and to that body of work.