Writing Prompt

I saw this image online, it is a writing prompt, and thought it would make an interesting story. The photo leaves lost of room for emotions and possibility's, like is the soldier playing a sad song because he is sad or a happy song to cheer himself up?

Is the soldier lost? On enemy territory?

How did the piano get there? Where is it? Near the ruins of his home? If so, why is the home ruined?

Good luck, soldiers!