Marathon is a 2005 SK Movie based on Bae Hyeong-jin, a runner with Autism.
According to Wikipedia this film popularized the Term for Autism: 자폐증, japyejeung or self-closed syndrome..
I got this movie in Seoul for just 1,000₩ About 1USD/11Pesos, at the moment I didnt know what the movie was about but a friend told me it was good and Im glad I got it because it is indeed a good movie Made me cry a little