The Cross (2016)

Shunsuke Fujii was a bullied middle school student. He took his own life. A letter left behind referred to his classmate Yu Sanada as a friend. Sayuri Nakagawa was a girl that Shunsuke liked. Shunsuke's father can not forgive Shunsuke's classmates and his mother's life has been destroyed by his death. They have spent 20 years of their life carrying their own cross since Shunsuke Fujii's death.