My Sister's March commemorates the 50th anniversary of the Masan protest on March 15, 1960, where numerous citizens and students demonstrated against electoral corruption under the Syngman Rhee regime. The violent clashes that followed resulted in several students being killed, with many others suffering from the aftermath. This drama tells their story
The Japanese actress Yuko Fueki was inspired by the film to pursue a career in Korea; Yu Aoi desired to act with Han Suk-kyu ; Chinese singer Lee Jian wrote his own version of "Christmas in August" as a pop ballad; a close Japanese remake by director Shunichi Nagasaki was released in 2005. Many Sinophone filmmakers have also named it as among their favorite South Korean films: Andy Lau, Tony Leung Chiu Wai (at Korean press conference for Hero, January 16, 2003), Leslie Cheung (as movie recommendation to Chinese radio listeners), and Feng Xiaogang.
The film's also had an enduring influence within the Korean film industry. Actor Jang Hyuk reportedly studied the film in preparation for his comeback role in MBC drama "Thank You" . Assistant Director Park Heung-shik was influenced by particular scenes of Jung-won washing rice and teaching his father the VCR remote control, for his film Bravo, My Life!. The muffled weeping scene also found its way into My Mother, the Mermaid. Characters in Barking Dogs Never Bite and Girls' Night Out are shown, respectively, watching scenes of the VCR remote and lovers' stroll. Han and Shim are named as ideal casting choices by the eponymous aspiring script writer in My Sassy Girl.