Diamond is Unbreakable (Drama CD) (ダイヤモンドは砕けない ドラマCD, Daiyamondo wa Kudakenai Dorama CD) is a pair of original audio dramas based on Diamond is Unbreakable. The two CDs were bundled with the sixth and thirteenth volumes of the season. The first covers Josuke, Okuyasu, and Koichi's investigation of a local ghost story, and the other sees Josuke and Koichi try to help Okuyasu regarding a waitress he has fallen in love with.
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