The Diamond is Unbreakable Drama CD Collection(ダイヤモンドは砕けない ドラマCDDaiyamondo wa Kudakenai Dorama CD) is a set of two original stories adapted from Diamond Is Unbreakable that were released by David Production from 2016 to 2017 enclosed within the 7th and 11th volumes of the limited edition Blu-Ray. One having Josuke, Okuyasu and Koichi investigating a ghost story and the other with a yet to be disclosed plot.