Kim Taeyeon works at a famous business corporation, owned by Mr. Hwang Minsoo. She works as a responsible and a trusted secretary. Mr. Hwang has a huge trust on Taeyeon and she is his favorite employee because Taeyeon has a good personality.

One day Mr. Hwang gave Taeyeon a very important task. He wants Taeyeon to be the nanny of his only daughter, Tiffany Hwang. Not only as a nanny, but Mr. Hwang also wants Taeyeon to help Tiffany improve her not-so-good-personality. Because Tiffany is kind of a brat, and her father wants her to change. He thinks Taeyeon is the best person to change his daughter.

Will Taeyeon be able to change Tiffany and help her become a better person?

And if she does change, will real feelings grow between them?

KIM TAEYEON

- responsible, kind, funny, trustable, pretty, and mature. (but still, sometimes she's childish and dorky)

- she works at the Hwang Business Corp as a secretary

- she is widely known by a lot of people in her work due to the fact that she's really nice and she's pretty

- at first she's straight and she has a crush on her co-worker, Jang Wooyoung. But that will change when she falls in love with you-know-who. :))))

TIFFANY HWANG

- iresponsible, immature, spoiled, impatient.

- but deep deep inside of her she is really nice, caring, sweet, and lovable.

- she is the only daughter of the owner of a huge business corporation in South Korea.

- she may usually be a brat, but sometimes she also feels sad and miserable because many people hates her because of her attitude.

- she likes dating different guys but she still hasn't found the "right one" for her.

JANG WOOYOUNG

- kind, cute, funny, smart, and sensitive.

- he works at the Hwang Business Corp as Mr. Hwang's personal assistant.

- he has good charms, which makes ladies go crazy about him.

- he likes Taeyeon ever since, but he's afraid to admit it since he thought that Taeyeon might not feel the same way.

HWANG CHANSUNG

- nice, sweet, sneaky, mischievous, understanding, and patient.

- he's a nice guy and many girls likes him because of his charms. But, he is a playboy.

- he is Tiffany's younger brother and Wooyoung's bestfriend.

JESSICA JUNG

- nice, cute, a bit clumsy sometimes, smart, and sensitive.

- she is Tiffany Hwang's bestfriend since college.

- she's a model and a singer in a bar.

SUNNY LEE OR LEE SOONKYU

- kind, sweet, funny, caring, and also a bit clumsy sometimes, smart and understanding.

- she is Taeyeon's co-worker and also her bestfriend.

- everybody at work (especially men) adores her for her adorable aegyo.

(Other characters will be mentioned in the story)