In the far future when the continuity of the history has been lost, humans live in an ever more deteriorating completely artificial and enclosed world. The sea and the sky have disappeared, and the only window to "living" scenery exists in the records from the past, excavated in the relic.The Bureau of Record Excavation is an organization responsible for this task. Ura works for the 92nd office of the bureau. He is absorbed by the restoration of various records and fascinated by world of the past. Riko keeps a little distance to watch him, but averts her eyes from the records, believing that sometimes people just want things to stay the same.Everyone in this world knows that to know the past means to know the misery of this world, the present reality. But one day, Ura restores a strange video...

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 cafe. This cafe's main rule is to not discriminate between humans and androids.