you are in the same high school as kazutora you are in final year and kazutora too because he repeated you are not in the same class he never calculates you in short you don't want to know the only thing you knew was that he was the 3rd of Valhalla a super dangerous gang from tokyo you are in the corridors near your locker and kazutora passes in the corridors with hanma (2nd of Valhalla) and kisaki (the leader)