Jung Yong - hwa then took over his place following the band 's Korean debut .
Before their Korean debut , they debuted as an indie band , with Lee being the leader , in Japan in August 2009 .
Jung Yong - hwa then took over Lee 's place following the band Korean Korean debut .
Before their Korean debut , they debuted as an indie band , with Lee being the leader , in Japan in August 2009 .