Barefoot Gen 2
Three years after the Hiroshima bombing, a teenager helps a group of orphans to survive and find their new life.
Starring Issei Miyazaki, Kei Nakamura, Masaki Kouda, Kae Shimamura, Kimi Aoyama, Kōichi Kitamura, Masato Yamamoto, Masumi Satou, Michi Yamamoto, Takao Inoue
It's a animation and drama movie, and has a rating of 7.2 out of 10 from Imdb which is usually fine for this kind of movie.
Watch it here
Not found streaming from Indonesia.