Original name: 鉄の子
Release date: February 13, 2016
Movie
Average time: 68 minutes
Genres: Family, Drama
Synopsis: Rikutaro and Mariko are in the same grade at an elementary school. They become brother and sister after Rikutaro's mother and Mariko’s father marry. After their marriage, the children become upset because they are teased by their classmates, so they hatch a plan to make their parents divorce.