Kazuki goes to an empty store to buy medicine for the injured pilot, but the UN forces pick up the pilot and the robot, Hartzenon before he returns. Finding the pilot, whose name is Yayoi, missing Kazuki searches through empty streets for someone. Soon people begin to return to the city and Kazuki goes to his house to find his parents, but they aren't there and neither are any of his things. Ken Sanada of this world greets him then explains that he doesn't exist in this world and Mitsuki is from his own world but she arrived a month earlier.
父さんも母さんも、僕のことを知らなかった。やっぱりここはパラレルワールドなんだ。そこに現われたのは軍服姿の真田先輩だった。連れて行かれた地球防衛軍の基地で、僕は僕の置かれた現実を知ることになる。「お願いです。僕を元の世界に帰してください」……けど、この世界の真田博士にそんな余裕はなかったんだ……。
Kazuki no acaba de creerse lo que le ha pasado. No solo ha aparecido en un mundo totalmente extraño, donde los robots gigantes luchan entre sí, sino que han sido capaces de manejar uno de ellos. Además, la piloto y su mecha han desaparecido. ¿Cómo puede volver Kazuki a su casa?
