( pics from Soompi )
I recommande this series. It's very funny. Right now, I have watch it up to eps 3.
Here the summary from Soompi :
Lee Da-hae plays the role Ju Yoo-rin (주유린) who is an imposter proficient in English, Chinese, and Japanese. Lee Dong-wook plays the role Seol Gong Chan (설공찬) who is the second generation heir of a big corporation. His grandfather requests him and Yoo-rin to become brother and sister abided by a contract. Park Si-yeon plays the role of Kim Sae-hyun (김세현) who grew up in a rich family and dreams to become a tennis star with the nickname “Sharapova of Korea (한국의 샤라포바)â€?. Her charm and intelligence attract many men. She and Yoo-rin have cutthroat competitions. Lee Jun-ki plays the playboy role Seo Jeong-woo (서정우).