Movie was first scheduled for release in Japan on May 15, 2020, but postponed due to the COVID-19 outbreak.
Based on two novels in the "Kazuhiko Takano Series" by Shuichi Yoshida: "Taiyo wa Ugokanai" (published April 25, 2012 by Gentosha) and "Mori wa Shitte Iru" (published April 22, 2015 by Gentosha).