According to Zhang Baorong, the director of this film, Mr. Rei Lin, met an old woman while filming in Jilin, China. The old woman dictated an experience of comfort women, which deeply moved the director Rei Lin. Finally, according to this dictation, it was processed into a script for this film.
It tells all kinds of horror stories about girls from China and South Korea who were forced to act as comfort women, and Japanese girls who took the initiative to act as comfort women in China.