Who knows what he’s listening to. It hardly matters. It’s the concentration on his face that tells the story.
A side note to this photograph:
It was taken with a Ricoh GR, a tiny powerhouse of a camera that punches way above its weight when used as the weapon of choice for street photography. If you aren’t aware of this little beast, I suggest you read up on it. The GR is a cult camera in Asia. Too bad it’s not better known on this side of the ocean.