Summary: I know this is for fanfics, but I wanted to give some background about the picture. I based the AU on this video (violinist bishie behind the link). I liked the idea of a proletarian Yama and a bourgeois Gokkun. Gokudera comes from a wealthy family and runs away from home taking his violin for making some profit out of his talent while living on his own. Yamamoto listents to it in the streets and becomes captivated (doesn't seem the kind of guy who appreciates music but oh well...).