Souya Kuroi lives a peaceful life despite having no memories of his past.

But one day, the world ends up under attack by huge unidentified floating objects known as "Nebula Weapons" which soar the skies and cause panic. Soldiers are sent to stop them but they desert and run 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 enveloped in big robot frames.

Along with the cat-like Sensei and the gothic lolita girl Ginko, Souya is dragged into the fight, is this the time for Souya to join the heroes in a fight for humanity?
No, apparently he has to fight off the heroes now.

"I'm an ally to people I want to ally with. That's all!"

A new mecha series by Satoshi Mizukami - both as a manga and an anime.