This is a drama CD that came with volume 4 of the Aldnoah.Zero BDs.

Extra Episodes 01 and 02 exist, but 01 is a one-chatper manga (about Slaine shortly after his father’s death) and 02 is a set of four short stories (about Inaho and Yuki before the events of the series).

Apologies in advance for any shitty timing/etc. The audio is lossless (FLAC), encoded from #649743