CHARACTERS:

Jang Yoonhee (23): NSS (National Security Service) Agent that was recruited along with Ji Sooyeon and Yoon Doojoon. Courageous, intelligent, swift and full of kindness. Has a big heart, but ruthless when needed to be. Grew up in an orphanage until she decided to leave after graduating high school. Struggled to earn money for a place to live and food. Was found by Yoogun in the alleyway, fighting off a group of men as they tried to harm her. He soon took her under his wing and trained her to be in the NSS. Provided Yoonhee with a roof over her head, food, and a brotherly love that she's never recieved. Became one of the top shooters within the NSS.

Yoon Doojoon (24): NSS Agent that was recruited along side with Yoonhee, Sooyeon, and Byungjin. Swift, bold, strong willed, intelligent, and the joker amongst the agents. Has been good friends with Yoonhee, Sooyeon, and Yoogun (NSS TF-A Team leader) ever since he joined NSS. 

Ji Sooyeon (24): NSS Agent that grew up with Jung Yoogun ever since they were teenagers. Eventually was trained and recruited into the NSS with the help of Yoogun. Knew Yoonhee ever since Yoogun took her in. Took on the role of an older sister Yoonhee never had. Fearless, swift, strong willed, loving, and sweet. In love with Yoogun.

Jung Yoogun (25): NSS Agent and NSS TF-A Team leader. Has grown up with Sooyeon since they were teens, and always got into fights when he was younger. Kind, brave, and a good fighter. Came across Yoonhee while she fighting and helped her fight off the men. Took her in and cared for her as if she were a blood related sister. Has been along side, taking care of Yoonhee ever since she was 18. Has been both a fatherly and brotherly figure to her.

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The heart yearns for the love of another.

Yet the pain it has to suffer just for the happiness of the other.

Is the pain worth it?