Planet With

The world is under attack, from huge unidentified floating objects. The first attempts to stop them have been unsuccessful, some soldiers have deserted to go home to enjoy their family time.

7 heroes show up to fight the unknown threat. They fly up in the sky in a glow of light while they are enveloped in big robot frames.

Is this the time for Souya to join the heroes in a fight for humanity?

No, apparently he has to fight off the heroes.