Love Undercover 3

Wao is an 18-year-old who intends to join the police force. She is intelligent, defensive and tactful to get advantages from others. In one occasion, she rescues Sergeant Chung and his team. To express his gratitude, Chung perusades Wao to join the police force for the high salary and he returns to the police-teaching academy just to assist Wao to graduate successfully. Wao then joins Chung's team, they spoil her and the spirit of the team drops. (mydramalist.com)