Kim Min Seo

Lee Ma Ha is a member of the new K-pop girl group Tea Party, formed by Ji Hak, who was once the manager of the famous boy group Shax, but resigned after the sudden disappearance of member Eun Jo in the middle of a concert. Prior to joining Tea Party, Ma Ha was a member of the group Omega III, which disbanded on its debut day due to a tragic incident involving a former trainee at the group's company. This led Ma Ha to support herself by performing as an impersonator of the popular solo singer La Li Ma, gaining her public notoriety. Starting anew with Tea Party, Ma Ha finds herself repeatedly crossing paths with Kwon Ryok, the center and most popular member of Shax who is still haunted by Eun Jo's disappearance three years later. While Ryok initially dislikes Ma Ha due to her imitation of Li Ma, the two eventually begin to grow interest in one another and start a secret relationship that could put both of their careers in jeopardy. Meanwhile, Lee Yu Jin, Ma Ha's loyal friend who is the center of the rising boy group Sparkling, has been in love with Ma Ha since their idol trainee days. When he notices the budding relationship between Ma Ha and Ryok, he determines to protect her from Ryok and lead Sparkling to beat out Shax as the most popular boy group in the industry. (Source: Wikipedia) ~~ Adapted from the webtoon "Imitation" (이미테이션) by Park Kyung Ran (박경란).

Two wannabe spies break up when one of them gets fired. Years later, both end up being spies working for different units, so they have to keep their covers up in real life. Gil Ro uses his real identity, hence why he was seemingly fired, to spy on his rich father. So, when Kim Seo Won appears as a new employee, he wonders if she really is just a doppelganger of the woman he loved. (Source: MyDramaList)