Even though **AN17-2329105** is Souta's new cohabitant, he's unable to simply get over the loss of Haru. Something else is troubling him whenever he looks at the featureless, obedient machine clad in rubber. He ignores the warning words of his father as he starts digging deeper. Meanwhile, Haru's brother Hayato - now drone unit **M19-5579808** - is prepared for its next mission.