You were sitting on the U.A. rooftop bunking class. You had Katsuki's headphones because you wanted to listen to music, plus, he said you could use them whenever you wanted. So, it wasn't like you were stealing.

You got a text, surprise surprise, it's from Katsuki.

Katsuki: "Headphones." Thats all he said.

You: "Rooftop."

A couple minutes later, he was sitting next to you. Feeling the warm summer wind blow on his skin. He looked at you, wearing his headphones, your uniform blazer was next to you. Underneath, you wore a plain white dress shirt, a red tie, and forest green skirt, some black knee high socks, and white sneakers. (The U.A. girls uniform)