He celebrated his 20th anniversary in entertainment by holding a concert titled One Fine Day in October 2014 .
After resting for a year , Ahn returned to work in April 2014 via the musical Le Roi Soleil .
Ahn celebrated Ahn 's 20th anniversary in entertainment by holding a concert titled One Fine Day in October 2014 .
After resting for a year , Ahn returned to work in April 2014 via the musical Le Roi Soleil .