My Girlfriend Is An Agent (2009)

An international crime syndicate is plotting to steal a biochemical weapon from Korea, and two secret agents have been deployed to stop them – sultry super agent Soo Ji (Kim Ha Neul) and bumbling rookie Jae Joon (Kang Ji Hwan). Soo Ji and Jae Joon are actually former lovers who split bitterly because of Soo Ji’s constant lying to conceal her work. Now they’re bickering away on the same mission, still unaware of the other’s true identity!

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My Girlfriend Is An Agent (2009)