Your father sent you to a boarding school, this school has a strict rules. There are 6 classes, class A, B, C, D, E, and F. Class A is for the smart students, this class is the best class in this school while the other class were called 'the underclass'.

Every class has it's own dormitory building, students were also not allowed to go out of the dorm above 10pm. Class A has their own library and other class were not allowed to go in. And luckily You become one of the top 3 smartest students with straight A plus the moment you got accepted into this school.

Finally today you would officially moved into the boarding school, you packed your things and ready to go.