Since the girl is the only thing with color in this picture, I think she lights up the boys day and makes him feel happy. He also looks like he is giving her a dreamy look because of the way his head is tilted to the side. As if seeing how amazing she is. The girls eyes look closed so I think he wants to lean in and kiss him. I also think her head is tilted up because he is taller than she is so she has to tilt it up to reach him. Also, in the background you can see a house with the lights on so I think that he is dropping of the girl at her house and giving her a goodnight kiss.