The Chi

Yeong Joon has never been turned down in his entire life. But his secretary tells him that she will quit. He wants to know why she would quit and asks for advice from people around him. Young Joon tries everything he can to make Mi So stay.

Yeong Joon has no idea why Mi So wants to quit, so he proposes to Mi So to keep her around him. Surprisingly, Mi So rejects his proposal. Yoo Shik, Yeong Joon's friend, gives him an advice on how to stop her from quitting.

Yeong Joon goes to the amusement park with Mi So and gives her retirement presents. However, Mi So, who only cared about her job, decides to go out on a blind date.

Yeong Joon gets all jealous. They visit an art center and get to spend some romantic time. Meanwhile, Yeong Joon’s brother Seong Yeon comes back to Korea. But it seems like there's something weird going on between these two brothers.

After realizing he is in love with Mi So, Yeong Joon makes effort to show his love to her with some of the most ways. However, Mi So, who doesn't have any idea about what's going on, is standing next to Seong Yeon in a pretty dress.

Mi So asks for a day leave for the first time. But she does not know what to do and where to go because she has never taken a day off.

Mi So and Seong Yeon get closer as time goes by. This makes Yeong Joon so jealous to the point where he uses more direct ways to show his interest. Mi So is all excited about the workshop, but Yeong Joon suddenly appears, leaving employees dumbfounded.

Yeong Joon invites Mi So to his house. Mi So feels weird and nervous even though she's been to his place so many times. At the opening ceremony of Art Center, Seong Yeon makes a speech and Mi So worries about Yeong Joon.

Their relationship has finally begun! Unlike Yeong Joon, who wants to tell each and every one of the office employees that they are dating.

The guy Mi So has been looking for is not Seong Yeon, but Yeong Joon?! Mi So doesn't get why people around her would lie to her telling Seong Yeon is the brother. To make things clear, Mi So visits Yeong Joon's mother.

Mi So faints after remembering being kidnapped in the past. Mi So wakes up and starts crying knowing the guy she has been looking for is standing right in front of her. Yeong Joon kept the secret to himself not wanting her to know about her past.

Yeong Joon worries so much about Mi So, as he knows what it is like to know about one's sad past. Yeong Joon wants to take care of her all the time, so he moves in with her. However, Seong Yeon wonders why his brother hasn't said anything about this.

Yeong Joon leaves for a business trip. Upon his arrival, they spend time together feeling all happy. But it seems like someone got the wind of what's going on between Yeong Joon and Mi So.

They are both now facing obstacles. For Yeong Joon, it's Mi So's father- and for Mi So, it's Yeong Joon's "girl" friend. It's almost that day- Mi So's last day at work. But Mi So starts to have mixed emotions.

Mi So's dad objects to the marriage at first but approves their relationship after drinking with Yeong Joon and feeling his sincere love towards his daughter. Meanwhile, Mi So calls her "boyfriend" Yeong Joon while drinking with her friends.

Yeong Joon and Mi So’s wedding preparations are almost done following his proposal. Yeong Joon is a little upset because of Mi So who "still" only cares about work, and Mi So prepares a special give to make him feel better.