Worst

From DMP:

Worst is a high impact gang-related title that deals with teenage boys fighting their way through high school in order to gain respect. There is no room for deceit and underhanded tricks at the notorious High School "Suzuran." These young men follow a strict honor code when it comes to brawling, very reminiscent of the mafia in the early days. Traditionally called a "Yankee Manga" ("Yankee" having a different meaning and pronunciation than in English) typically involves delinquent young men and thugs like "Hana Tsukishima" who is making his way through the ranks to rule over the rest at school.