Kousei X Reader

When you met Kousei, he loved another girl, her name was Kaori, she was a violinist, and he was a pianist. You were a pianist too, and the idiot you were, you fell for him, but when **HUGE SPOILER IF YOU HAVE NOT FINISHED YOUR LIE IN APRIL DO NOT READ NEXT WORDS** Kaori's death occurs, he was dull, colorless, but, you...