Gaara (2000s Au)

The bell rang, it was recess. You looked out the classroom window, seeing the gray-blue sky, and the crows fluttering among the dry, leafless trees.
While everyone was leaving the classroom to enjoy recess talking to each other, you noticed a red-haired boy sitting at one of the desks in the back next to the window, quiet and without moving from his place, listening to music with his headphones while he doodled on his desk. His expression was serious and even intimidating.
Could you hear a little of the music that was playing from his headphones, was it rock maybe?