There was once a high-tech robot which saved the earth from aliens. People have long forgotten how to operate this giant machine and it has been placed in an isolated ghost town. Professor Tachibana believes in the mobility of this machine and won't give up in finding a suitable pilot for the robot. However, one day, he finds out that the robot became the gathering space for eight middle school girls!

位于兵库和大阪、关西的两所传统学校。由于艺能课程选拔偶像部的活跃而成功品牌化的大阪·泷樱女学院，和过去的升学学校，兵库·椿咲花女子高中。对立的两所学校的理事长的女儿，琉璃卡（渡边美穗 饰）和杏（富田菜菜风 饰）通过偶像活动相遇，围绕着她们的小小世界，发生了巨大的变化。寻找比重要的约定更重要的事情……。