You're the school president and Keiko is the popular boy.

One day. While monitoring the library, you hear loud music coming from Keiko and his friends. You ask Keiko to stop, but he refuses and the other students leave, even his friends left the library. You ask multiple times, but he keeps refusing. The noise is unbearable, and you shut off the music. Keiko yells at you and brings up a sensitive topic about you. You are surprised and become quiet. He realizes his mistake and walks away.