Choi Hana is an independent girl that doesn’t rely on others for help. She does things her way. She has never dated anyone, since she’s so focused on her work and her dream. She cares for her sister a lot. She is known as the boring one of the two. She never talks and is usually on the phone talking about her work. She’s 24 and has graduated from college. Is very protective of Minjae. Hana works hard to put a roof over her and Minjae’s heads. She’s a secretary for Lee Corps.

Choi Minjae is the younger sister of Choi Hana. She’s also independent, but she has friends that she sometimes goes to for help. Isn’t the queenka at school nor is she the loser or nerd. She doesn’t believe in the stupid cliques that are formed, so she has her own group of friends that are also in the middle. She gets good grades, so once she graduates she can help Hana with the bills. Hopes Hana can find someone that will care and love for her. Absolutely despises men, since something from the past always haunts her.  She’s 20 and is currently enrolled in Seoul University. She’s majoring fashion designing. Has a part-time job at a café, where she works after school and during the weekends.

Jung Jinyoung is one of the kingkas at Seoul University. He’s rich, stubborn and unexceptionally handsome or pretty, whichever one you prefer. He loves to tease Minjae for no apparent reason. Is the younger brother of Lee Hyukjae, also known as Eunhyuk. He was adopted by the Lee family, but decided to keep his last name instead. He ignores all the girls that are always following him, since they’re always acting cute or trying to get his money. Most mistake him for being a player because of the way he looks and acts, but he’s actually nowhere near being a player. Is currently majoring music composition, since he wants to become a composer.

Lee Hyukjae, or better known as Eunhyuk, is currently working with his dad at Lee Corps. He’s a total playboy compared to his younger brother, Jinyoung. He despises his parents, since they never showed love or care towards him. His dream was to become a professional choreographer. Usually has a new girlfriend every week, bringing a bad reputation about the way the Lee family takes care of their eldest son. Since. Eunhyuk is always playing around, his parents decided to get him a secretary that they knew for sure wouldn’t quit. Shoes an interest in his new secretary, but plans to throw away like every other girl out there once he was done with her, but he never thought it would be this hard.