A Man Who Was Superman (2008)

A Man Who Was Superman is a quirky comedy about a man named Song Soo-Jung who believes he is Superman. Song Soo-Jung spends his days helping people in need and fighting crime, all while wearing a Superman costume. However, he also struggles with his own personal issues and has difficulty distinguishing between reality and fantasy. As his friends and family try to understand his eccentric behavior, they are drawn into his crazy world of superhero antics.