Protect the Boss( Hangul : 보스를 지켜라, literally:Defend Your Boss), formerly known asThe Boss Has Changed( Hangul : 보스가 달라졌어요) andThe Last Secretary( Hangul : 마지막 여비서), is a 2011 Korean drama starring Choi Kang-hee , Ji Sung , Kim Jaejoong of JYJ / DBSK , Wang Ji-hye , and Park Yeong-gyu .

South Korea from 3 August to 29 September 2011 on Seoul Broadcasting System (SBS) on Wednesdays and Thursdays from 21:55.

Ji Sung ) is an incredibly immature young man and a director of DN Group, as well as the youngest son of the chairman ( Park Yeong-gyu ). Noh Eun Seol ( Choi Kang-hee ) a tough and courageous girl, was once a problematic girl in school and has a poor academic background. She is struggling to find full-time work. On the other side, there is another mature and hardworking young boss, Cha Moo Won ( Kim Jaejoong ) who is seemingly perfect but also has his own problems to deal with. After telling Director Cha Moo Won, who is Ji Heon's cousin, a piece of her mind, at an interview at DN Group, she is hired as a secretary to Ji Heon. Determined not to be fired from her first professional job, Eun Seol works diligently putting up with Ji Heon's childishness and helping him to prove that he can be a successor of DN Group. Through their working relationship, he begins to deal with the secrets of his own and falls for her.