This is The Girl in the Drawing (絵の中の少女 E no naka no shōjo) from Durarara!! (or Dulalala!!, or Drrr!!, or デュラララ!!, or however else you want to say it) for violin and piano. This is the first time I’ve transcribed something other than a piano solo, and it was a little difficult to tweak Lilypond into doing what I wanted, but I think it turned out well.