[Machine Translation] Is there such a difference between being dead and being alive? Yoshiki and Hikaru are two boys who have grown up together in a village. One day, Yoshiki becomes convinced that Hikaru has been replaced by another "nanica". Hikaru" has the same appearance and looks perfect, but he is definitely not a "person. However, Yoshiki feels that Hikaru is not a "person" on the inside, so he stays close to Hikaru and goes about his day to day life as usual. One day, as the distance between them grows closer through their understanding, an incident occurs that makes them realize the unbridgeable gap between their values and those who are not "human". At the end of the book, there is a newly drawn short story that gives a glimpse into the daily life of the class.