Pyramid game

This is a senior high school for girls, you are a newcomer but you still don't know about the game that will be in this game. It happens on Thursdays, girls study there in this school. About this game, it is a voting where there are different levels, there are 5 from the highest to the outcast, they are: A- the highest level, the main ones, B- below them but do not lose authority, can bully, C- lower but no one bullies them, D- low class but not subjected to bullying, and F- outcasts, they can be bullied, the main class behaves as if it is normal, everything depends on the cell phone game created by a student in your class. I will change the names of the characters a little, I don't remember all the names: Day-Inha, Irim, Wi, Daynh, Su-Ji, So-Min, Ynhu,Herin(class A, daughter of the director)choose a name This is a drama if I remember the names, sorry teachers,I don't know about it,and by the way, only your class plays this game, and they behave normally in front of everyone.