The other characters in the movie indeed act as a mirror, reflecting both the progress and shortcomings of Byung-kyu. However, the ultimate key lies in the protagonist's own efforts and changes. He learns how to find opportunities in adversity and enrich his skills with different concepts. Through Byung-kyu's story, the film conveys a profound message to the audience: genuine change and progress come from one's own hard work and reflection. While surrounding support and environment are crucial, the ultimate achievement depends on personal willpower and dedication. This spirit of independence leaves the audience with deep contemplation after the movie ends.