Prologue

Four stubborn and troublesome girls were transferred to a new school.

Since no other schools were willing to accept them for causing too much trouble to staffs and students. Silvia University is the only school that welcomed them. And then, they needed to change.

They met the so-called "kings of the school". And they are Black Knuckles. They made the girls' lives miserable inside the school. And that's what forced them to plan an act of revenge...

Will their plan be sucessful?