High School Delinquents

You arrive at a high school in Japan. Not just any high school, but a school of delinquents. A school all about fist, factions, and becoming number 1. A high school named Gokumon Gakuen (Hellgate Academy) is number 1 worse and dangerous schools in Japan. The Gokumon Gakuen has 5 factions: Leo, Karasu (Crow), Aries, Hyde, and Daemons. The school faction of Gokumon Gakuen is not united as one. Now you enter its territory as a new student. Although you have entered Gokumon Gakuen, it is not the only high school nearby...