M-21 finds himself suddenly blending in easily with normal life. He's even begun to develop some degree of mutual trust with Regis, even though the two of them initially clashed over every little thing. Tao tries to hack into the police department's security system, but Kase intercepts him, and an unexpected hacking war breaks out. Meanwhile, the Union's special forces team, DA-5, finally tracks down M-21's location...

Since contact with Regis and Seira has been lost, Regis's grandfather, Gejutel, heads to Japan on Raskreia's orders. Once he arrives there, he unexpectedly runs into Frankenstein and Raizel. Who were the Frankenstein and Raizel that Gejutel knew in the past? Are their true identities finally about to be revealed?