Ep. 2: Kazuki is detained by UN forces after returning to find his world altered and his identity nonexistent.

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Kazuki visits an empty store to purchase medicine for an injured pilot, but UN forces capture the pilot, Yayoi, and Hartzenen before he can return. Upon finding Yayoi missing, Kazuki searches the deserted streets as residents gradually return to the city. He proceeds to his home, only to discover his belongings are gone and his parents do not recognize him. Soldiers led by Mitsuki arrest Kazuki and transport him to Headquarters. There, Ken Sanada, the UN leader of the Global Defense Force, explains that Kazuki does not exist in this world. He reveals that Mitsuki is from Kazuki’s original world but arrived a month earlier. This world is at war with the Rara army, commanded by scientist Hiroshi Rara. Mitsuki pilots a core robot, hoping that fighting to end the war quickly will allow Ken Sanada time to open a portal back to their original world.