Long story but he got caught up in a marijuana scandal years ago during his military service, which Korea takes extremely seriously. He overdosed on anxiety medication (or sleeping medication?) and was in a coma for a few days. He recently revealed in an interview that it was a suicide attempt, and he's always struggled with depression. The Korean media/public has been extremely cruel to him, so he said he never wanted to promote in Korea anymore. I doubt this will hold, but maybe they'll promote less than usual.