When you were created as a tool of a megacorporation, can you ever escape its grip? Juzo hasn't got an answer to that question just yet, but he's determined to live his life for himself. Too bad for Juzo that the agents of Berühren have other ideas. A man claiming to be Tetsuro's brother wants to test a new version of Berühren's Harmony device, and Juzo and Tetsuro are the guinea pigs. Survival means Juzo will need to unleash his full capabilities as a Gun Slave Unit, but this time that might not be enough...