My Girlfriend is an Agent

 ♥Korean Movie

Synopsis:
Ahn Soo-ji, a secret agent, is dating Lee Jae-Joon without telling him what her job is. She is forced to lie to him all the time about what she is doing and where she is at because of her job. He can no longer take it and decides to break up with her and leaves Korea to study. A Russian group is in Korea trying to steal a "mutant virus", a chemical weapon that can spread and harm people. Three years later Lee Jae-Joon comes back to Korea as a rookie agent disguised as an accountant. On his first mission to chase the Russian organization he runs into Ahn Soo-Ji, who is disguised as a cleaning lady. They try to work out their relationship but end up lying to each other all the time, but they don't know that they are both secret agents. 

-Funny from beginning to end!