for this you can be alhaitham or your oc

Kaveh was a well knew pianist in this Au, you were his best friend so you were always when he struggled since you knew how to play violin well you generally played with him when he played and you were bored

kaveh used to struggle a lot as a pianist because he pressured himself too much just to get out a smile from others today to brighten his mood you played with him a song called final duet since this was a beautiful song,he was a bit happy