Tetsuo is gradually accepted by Ao and the others he meets on the frozen Earth. However, his peace is short-lived, as he is attacked by a galactic monster unlike any he has ever fought before. As people flee in unison, Tetsuo stands alone against the monster. He finds himself in a desperate situation against its overwhelming power, but just when all hope seems lost, who should appear—!

Welcomed into the Takimura family, Tetsuo meets Hagane, a girl who lost her mother a month ago. She shows Tetsuo "something" that her mother made in her workshop. Meanwhile, an organization called "E-RDE's Light (Vierde)," led by a mysterious man known as the Colonel, learns of Tetsuo's survival and begins to make ominous moves. The shadow of a new enemy is quietly closing in on Mishima Mall!