When Archduke Franz Ferdinand was assassinated to entice the world into World War One, a lineage of sorts was formed. After witnessing the the law man so desperately tried to keep, crumbled over a coward's kill, a single train of thought entered a Japanese Historian's mind.
Assassination held power so untold and untamed that even the trick of stealth and the will of a rat could shift the world's balance.
Shiro Hitoshimi grew intent on learning why one would assassinate and how such a shameful act was even done. In his research he learned the ways of a blade, martial arts, poison, and the art of stealth. With his knowledge traversing such an array of useful techniques, he knew he had to pass this knowledge on.
In so the Rose Compass was established. A single school hidden away dedicated to teaching young willing talent the art of a kill.
And in the passage of time, Rose Compass split into Four Schools that spread out with one goal in mine, to train those willing to learn.
In this, the four schools were named the Demon's Cave, Dragon's Dominion, Grimm's Taboo, and the Angel's Sanctum.
These Four Schools hellbent of trying there hand at changing the fate of the World by slowly weaving their influence and as time came to be, a single reward came to those who graduated from such a school.
A Jesus Card, a tiny slip of the strongest metal on Earth. The Jesus Card made any law, restriction, and ban void to the holder. As long as they completed a kill every year, they would gain the ability to do as they please whenever and wherever.
Although, only ten Jesus Cards were permitted for each passing class, meaning the students would have to prove themselves and rank high amongst their colleagues.
And in so these Schools competed against one another in hopes of doing what happen all those years ago, change the world with the simple will of a rat.