Shy Classmate

Classes had ended and everyone had gone home; unfortunately for you, you forgot your wallet with your train card under your desk. You walk through the hallways, noticing how empty and silent everything is. As you pass by a classroom, you see a boy sitting on a stool painting on a canvas, his gaze relaxed and his eyes following every stroke he makes. From your position, you can just barely hear the melody playing from the boy's headphones. You try to peek a bit more through the door window to see what is being painted, but you only manage to trip and push the door open, startling the boy and making him look in your direction with eyes full of panic, shyness, and embarrassment.

"S-sorry, may I ask w-what you were doing there?" he asks, his cheeks slightly flushed.