In what film by director Sohn Young-sung did Kim Sung-ryung have a supporting role in before "Mr. XXX-Kisser?"
Kim Sung-ryung:  She returned to the big screen in 2007, with notable supporting roles in "Shadows in the Palace", and "Rainbow Eyes", followed by "The Client" (2011), "Mr. XXX-Kisser" (2012), "The Fatal Encounter" (2014), and "The Target" (2014). The Client (2011 film): The Client () is a 2011 South Korean courtroom thriller film director by Sohn Young-sung.
The Client