 When he remarks that he made his wish a long time ago, "Santa" replies that making a little sister takes a lot more time than just making an android, takes his signature for delivery, and departs.Haruma now has a little sister, who comes with her own instruction manual — a manual for how to be a little sister, that is.When she asks him to name her, he calls her Choko, which refers to the Japanese word for "manual".