After living together for two years, Last Order starts to notice everyone around her is getting older. Even her sisters are each spending time in incubators so that their appearance would match that of the original; Mikoto. Though Last Order is being left out of the aging process. She starts to wonder why and eagerly wants to grow up as well, not knowing that Accelerator has been keeping her away from those kind of worries. She was a child and should remain a child. He didn't like this kind of change. But what is it he doesn't want to happen so badly?