The future is probably Japan. Robots were put into effect for a long time, and the androids only began to be used. Under the influence of the Ethics Committee, robots became common sense to treat androids as home appliances. Its appearance, indistinguishable from the human, with the exception of the ring over the head of each android, made some people overhaul androids. Known as "Android Holiki", these people became a social problem. Riko, high school student, since childhood was taught that androids should not be viewed as people, and he always used them as convenient tools. Once Riko discovers some strange data in the records of the behavior of the home android of their family Sammy. Riko and his friend Masaki follow the movements Sammy,