Katsuki is your older brother. You’re his younger sister. You are in class 1A and Katsuki is a pro hero and has his own agency. 1A was planning on doing a concert for the school festival. You and Katsuki are close but he never knew your abilities with music. He figured that you were backstage crew. Present Mic announces that Class 1A will be singing around 10 songs. You didn’t know that he was invited from his agency to come. You didn’t know that he was here to watch.