Lee Sun Jung, the producer and director of 'Guitar Man,' shared his thoughts on the late Kim Sae Ron, the film's lead actress. In addition to being the CEO of Sungwon Pharmaceutical, Lee Sun Jung took on various roles in the film, such as directing, screenwriting, producing, and composing the music.

Recalling Kim Sae Ron, Lee Sun Jung described her as a dedicated and passionate actress who exuded warmth and professionalism in her craft. Despite Kim Sae Ron's unfortunate passing in February, Lee Sun Jung persevered with the post-production of the film out of respect for her final wish. Kim Sae Ron had expressed her desire for the movie to be shown in theaters, a sentiment Lee Sun Jung was determined to fulfill. He emphasized the importance of remembering Kim Sae Ron as an actress rather than focusing on negative controversies surrounding her.

When Kim Sae Ron was cast, she was amidst a hiatus following a DUI incident that had tainted public perception. Despite concerns from some staff members about the risks of casting her, Lee Sun Jung believed in Kim's talent and sincerity. Even after initially considering another actress for the role, he changed his mind upon meeting Kim Sae Ron and witnessing her thorough preparation and passion for acting.

During filming, Kim Sae Ron devoted herself entirely to acting by quitting her part-time job at a café. Lee Sun Jung noted her struggles behind the scenes despite her focused and flawless performances on set. He highlighted Kim Sae Ron's resilience and dedication, mentioning that her hardships were often concealed when she was in character, showcasing her natural talent for acting.

The news of Kim Sae Ron's passing deeply affected Lee Sun Jung, prompting him to donate all proceeds from the film's original soundtrack, which he composed, to the Korea Suicide Prevention Center. He emphasized the importance of honoring Kim Sae Ron's memory and expressed his hope that through 'Guitar Man,' audiences would appreciate the sincerity and talent of the late actress.