在这部行星与共科幻/动画片中,“我是想要让我成为同伴之人的同伴。仅此而已！”
失去了过去的记忆，平稳地生活着的高中生·黑井宗矢。
某天，他的城市突然遭到神秘的巨大兵器“星云兵器”的袭击。
宗矢与长得像猫的“老师”和哥特萝莉银子一起被卷入战斗当中，
但——没想到对手竟然是保护城市的7位英雄！
隐藏在宗矢记忆中的战斗理由究竟是？
Kuroi Souya is a high school-er living a peaceful life despite having no memories of his past. One day, however, his town is attacked by one of the mysterious Nebula Weapons. Together with the cat-like "Sensei" and the gothic Lolita Ginko, Souya gets dragged into a battle against - seven superheroes who protect the town. What is Souya's reason to fight? The answer lies in his memories.
反派乎？英雄乎？圣母乎？。荒诞or现实？机战or人情？（不断更新）。
