A long wait

I was having all night photo walk through Seoul one night. It was late, most people were already heading back to train station to catch last train. I still had photos to shoot and I was gonna go to an alley and have a smoke break. As I went in to the alley way I saw a woman sitting, coffee in one hand, just looking at the door. I was wondering if she was waiting for someone. Friend? Lover? She stayed for near half an hour and I thought I should take the shot or it's lost forever. I'm glad I did.