In the not too distant future androids have come into common usage: Taking the androids for granted, humans treat them as if they were common everyday tools, while on the other hand, some people empathize with androids due to their human:like appearance save for a digital ring floating above their heads: This has become a social problem and these people are frowned upon as a result: Rikuo, one who has taken androids for granted for his entire life, one day discovers that Sammy, his home android, has been acting strangely and finds a strange phrase recorded in her activity log: He, along with his friend Masaki, traces Sammy's footsteps and come upon an unusual café: