Krystal Jung is an 18 years old girl who lived in Seoul. She was a quiet and stubborn girl who only be friend with Tiffany Hwang and Jessica Jung who have same surname as her. They going to the same school. Lay Zhang was her childhood friend. She had a crush on him when she's 11 years old but he don't know. They being friend until Lay's family decided to return back to Changsha when they 15 years old. One night, when she attended Luhan