Shiori has been in search of her missing son, Koichi, for 5 years and has regularly handed out flyers with Koichi's photo and description at the station with her younger son. Kota. Kota is now 8 - the same age Koichi was at the time he disappeared. The family has always been ready for Koichi's return. One day, Kota meets a boy that claims he is his brother. Kota is full of joy with finally meeting his big brother who he only knows from pictures. However, the brothers keep their meeting a secret. But later, Saori witnesses Kota playing with older boys - one of them looks just like her missing son. She slowly approaches them...
