The stage of the story is in Japan in the future, robots have already entered people's lives, and humanoid robots have just become practical.
Influenced by the Robot Ethics Committee, it has become common sense to treat robots as "home appliances", and even those who care about robots that are indistinguishable from humans except for the rings on their heads are also called "drill systems". ”, has developed into a social problem.
High school student Lu Fu has been educated since childhood so that he never regards robots as human beings, but uses them as convenient props. At some point, Luf noticed strange words appearing in his home robot Sammy's movement log.
When he and his good friend Mazaki follow Sammy to a place, they discover a strange shop with the concept of "humans and robots are the same".
