Having been sent back eighteen years in time by a large-scale Revival, Satoru finds himself in the middle of his old elementary school as a ten year-old. After class, Satoru rushes home to find his mother. The following evening, Sachiko returns home late from work and is greeted by her son, who finds comfort in being able to see his mother again.
Hiromi Sugita is Satoru's primary school classmate who is a feminine-looking boy, and one of the original victims of the serial kidnapping case. He was killed in order to lead the police into thinking that the suspect did not know that Hiromi was a boy.