Rokkisei

The school of Saint Ishiyama Academy has a force within it that upholds the rules of conduct. They are known as the Six Knights (六騎聖, Rokkisei) (or horsemen). They are six captains of different sports teams and groups/clubs who possess an extraordinary amount of strength and fighting experience. They have set out to get rid of Oga and his friends, as they are unwelcomed by Saint Ishiyama Academy because the school are "allergic" to delinquents, and are backed by an unfair rule that allows them to carry out "judgement" on any person or party within the student body. The six knights challenged Oga and his friends to a sports competition (after a huge fight on the rooftops of Saint Ishiyama). The wager of the battle was clear: if Oga and his friends won, they would not be expelled. Himekawa also managed to clinch a deal with the teacher in charge of student life, whereby if the six knights lost the competition they would be stripped of their authority and privileges. In the end, Ishiyama came out on top.

The Rokkisei members are
 * Kaname Izuma (Leader) A 3rd year student and the stongest member. President of the Student Council
 * Shizuka Nanami A 3rd year student, Captain of the Archery club and Vice-President of the Student Council
 * Hiromichi Gou A 3rd year student and Captain of the Radio club.
 * Ichiro Shinjo A 2nd year and Captain of the Boxing club.
 * Mitsuteru Sakaki A 2nd year student and Captain of the Kendo team
 * Hisaya Miki The first ever 1st year student to be on the Rokkisei and Captain of the Karate team.