Due out on 08/30, 「鉄の檻」will come in three versions: regular (1,540 yen), anime (1,540 yen), and limited edition (4,290 yen). All three versions will have the title song and two coupling songs. The limited edition will also come with a blu-ray with the 「鉄の檻」video and the 6/5 Diver City live from the Question tour.

For more information, please see the official website. For information on individual store benefits, check here.