With Vampire Cop Ricky in 2006, Kim began starring in leading roles, and this was followed by the films A Bold Family, Our School's E.T., Death Bell 2: Bloody Camp, The Quiz Show Scandal, Romantic Heaven, and Ghost Sweepers.
Dengan Vampire Cop Ricky pada tahun 2006, Kim mulai tampil dalam peran utama, dan hal ini diikuti dengan perannya dalam film A Bold Family, Our School's E.T., Death Bell 2: Bloody Camp, The Quiz Show Scandal, Romantic Heaven, dan Ghost Sweepers.