Sandara Park as "Dara Mae"- known as Dara in her town or village. Dara lives in a poor family they stayed at a little farm in their town. And she got a very special quote for her family " I will do everything just for the life of my family to be better ". And she is just 12 yrs. old back then. 4 yrs. later she gained the name " Healer's Touch" because she always helps people and those who are sick. She has a part time job, 6 hours for her job and 12 hours for her school hours. When she earned enough her family goes to the main city and goes to a resort there she saw a good looking boy looking at her. Dara goes away because she knows that the boy is rich. Another 4 yrs. she is now a junior in her school and decided to work at the hospital nearby and she realizes the third patient she was holding is the father of the boy who is starring at her 4 yrs. ago what will happen next............?

Minzy as "Jian Wo" - bestfriend of Dara, daughter of the mayor in Dara's town. She is rich and friendly too but sometimes weird when it comes to love. Nicknamed "Ji " by Dara. Like her BFF she used to see a cute boy starring at her but this is always in her town. One night she receive a cat when she was 16 yrs. old ( the time when her BFF is at the main city)  and has a letter saying that " I Like You ". 4 yrs later  she goes to be a junior at Dara's school and work also a high class nurse in the hospital.

Kim Hyun Joong as "Jyu Young " (pronunciation "Yu")- A boy  from a rich family and the mysterious boy who stares at Dara when Dara was 16. He is very popular and sometimes short tempered. He loves playing insturments but hates drums and cymbals.

Lee Min Ho as " Shin II "- The shy boy who gives the cat to Jian and secret admirer of Jian. Also Bestfriend of Jyu and gives advice to Jyu when his bestfriend needs help

CL as " Kim Hansol "- a helpful girl when it comes to people specially those who are always in trouble like Dara and Ji and turns out to be the girlfriend of Jyu

Park Bom as "Jae Young "- the little sister of Jyu and has a only dream for Dara and Jyu to be together. Also whenever she makes a plan its always becoming 50-50 sometimes works and sometimes not and she gained the name from her family "Trouble Maker When it comes to Love".