Jang Yijeong is a teacher at St. Michol High, a private high school owned by his grandfather. He teaches Music and occasionally History. The school have THREE important rules that everyone must abide, student and staff alike. Rule no. 1: All staff and student must keep up appearance of the school at all times. Rule no. 2: No student or staff is allowed to have a part time job. Rule no. 3: No staff or student is allowed to be dating wit