For every warning you get, your grade drops. If you are a good and bright student, you can become your classes representative. Currently, the grades stand as:
Jung Eunji, 11th grade: C
Jung Jessica, 10th grade: C
Kim Myungsoo, 12th grade: C
Lee Joon, 12th grade: C
Son Naeun, 12th grade: C
Choi Jinri, 11th grade: C