Rina – Gray Zone By eXodius - September 9, 2010 0 380 Share on Facebook Tweet on Twitter Released 2010.09.08 “Gray Zone” is the first digital single released by Rina. It was also released in over 20 other countries worldwide via iTunes. Price ¥200 Tracklist Gray Zone From the JS! Wiki “Kagayaku Sora no Shijima ni wa” is the eighth single released by Kalafina. The title track will be used as the insert song for the anime Kuroshitsuji II.