Season 1
Kim Yoon Hee is a smart, responsible young woman with an independent drive. Since her father passed away, she has worked to support her family, but also managed to do well in her studies. When her younger brother's illness worsens, and their family is in danger of being evicted from their house for lack of money. In her desperation to support him, Yoon Hee decides to take the men's only national exam under her younger brother's name and disguises herself as a boy. On the day of the exam, Yoon Hee meets Lee Seon Joon and becomes friends. Lee Seon Joon comes from a privileged background and also possesses good looks. He is also arrogant. They both pass the national exam, and she has to share a room together with him at Sungkyunkwan University, while hiding her true nature. There, she becomes friends with the playboy, Goo Yong Ha, and rebellious Moon Jae Shin.
Episodes
1 Lesson 1 Aug 30, 2010 
2 Lesson 2 Aug 31, 2010 
3 Lesson 3 Sep 6, 2010 
4 Lesson 4 Sep 7, 2010 
5 Lesson 5 Sep 13, 2010 
6 Lesson 6 Sep 14, 2010 
7 Lesson 7 Sep 20, 2010 
8 Lesson 8 Sep 21, 2010 
9 Lesson 9 Sep 27, 2010 
10 Lesson 10 Sep 28, 2010 
11 Lesson 11 Oct 4, 2010 
12 Lesson 12 Oct 5, 2010 
13 Lesson 13 Oct 11, 2010 
14 Lesson 14 Oct 12, 2010 
15 Lesson 15 Oct 18, 2010 
16 Lesson 16 Oct 19, 2010 
17 Lesson 17 Oct 25, 2010 
18 Lesson 18 Oct 26, 2010 
19 Lesson 19 Nov 1, 2010 
20 Lesson 20 Nov 2, 2010