Chikyu yo, Yamato wa...

Six months have passed since the Gatlantis war. The surviving Yamato crew are at Heroes Hill, mourning their lost comrades. In the Time Fault Factory, the Yamato warps out from a higher dimension. Kodai and Yuki are alive, but trapped in this higher dimension. Yamanami, Sanada, and a few others attempt to convince the Earth Council to let them use the Time Fault as a booster, to save Kodai and Yuki. It's put to a vote, and the Yamato Crew win unanimously.