Hello, God! (2006)

The story is about a bright and innocent 27 years old guy with an IQ of 65. Because of his issues he is neglected by society and frowned upon, but he tries to be optimistic and not let it bother him. Seo Eun Hye, a fumbling swindler running from the cops and who only believes money can bring her happiness, and love will bring more sadness then it's worth. One day she meets this boy and hey completely changes her outlook on life.