Following the events of the holiday film Merry Little Batman, Bat-Family follows Batman, Alfred, and young Damian Wayne—who has taken on the mantle of Little Batman—alongside a few newcomers to Wayne Manor, as they navigate the fun and frustrations of life as a super family.
隶属于仙台的弱小艺能事务所“Green Leaves Entertainment”的WUG，历经挫折与经验，在“偶像祭典”当中击败国民级偶像组合“I-1club”，获得优胜。一跃成为顶级偶像……这么想着并没有过多久，发出“偶像经济不景气”这一呼声的这个时代、现实却没有那么简单。7人过着被脚踏实地的偶像活动所迫的每一天。 另一方面，就读于仙台市的中学的速志步、守岛音芽、阿津木一花3人，接连产生了对于偶像的憧憬……
