User blog comment:IamJakuhoRaikoben/Sorcerer Magazine, Issue 28: April 2014/@comment-122.252.238.74-20140505141039

Hey Carrot ! Is the answer that song of Gray’s? All I understood are the 1st and 3rd lines. The song came in the anime showing tray young making an idol of ice resembling UR. It was something like : Doko ma, demo sumiwara

Previously I had vague theories like Lucy’s pouch of keys, as I thought if 5 pence = 50 cent, and suppose he had some song like Keys To The Heart. ..