: When Yeon-du returns from her successful surgery, it is revealed there was a misunderstanding regarding which boy she actually liked. This creates a heartbreaking dilemma between Bo-ra's romantic feelings and her loyalty to her best friend.
The narrative follows , a 17-year-old high school student who is fiercely loyal to her best friend, Yeon-du . When Yeon-du has to travel to the United States for heart surgery, she becomes infatuated with a fellow student named Baek Hyun-jin . Bo-ra promises to find out everything she can about him while Yeon-du is away. 20th-century-girl-2022-1080p-nf-web-dl-movizland-com-mp4
While "stalking" Hyun-jin to gather information, Bo-ra grows close to his best friend, . The story develops through these key phases: : When Yeon-du returns from her successful surgery,
: The film shifts between 1999 and the present day (mid-2010s), where an adult Bo-ra receives a mysterious package that leads her to finally discover what happened to her first love after they were separated. When Yeon-du has to travel to the United
: Bo-ra joins the broadcasting club to stay close to the two boys, eventually finding herself falling for Woon-ho instead of just observing Hyun-jin.