done watching Sungkyunwan Scandal. i really like this series. its all about LOVE, FRIENDSHIP, PRINCIPLE, RESPECT and EQUALITY. as korean drama fanatic i like how this series show the thrill and comedy to every scene. 

those four main characters are really good portraying their role.

Micky Yoochunas Lee Sun Joon
Park Min Youngas Kim Yoon Hee
Song Joong Ki as Goo Yong Ha
Yoo Ah In as Moon Jae Shin

Sungkyunkwan Scandal is set in Sungkyunkwan University in the late Joseon era during the reign of King Jeongjo, revolving around the exploits and love stories of four youths. When her younger brother's illness worsens and their family is in danger of being evicted from their house for lack of money, Kim Yoon Hee enters the school under his name, disguised as a boy in her desperation to support him. There, she becomes friends with the intelligent and upright Lee Sun Joon, the playboy Goo Yong Ha and rebellious Moon Jae Shin .

(wiki.d-addicts.com)