Worst.

Worst (Japanese: ワースト, Hepburn: Wāsuto) is a Japanese delinquent manga series written and illustrated by Hiroshi Takahashi. It has the same setting as Takahashi's previous manga Crows and QP and revolves around a group of teenage boys who fight their way through the notorious high school Suzuran. The manga was first published by Monthly Shōnen Champion in 2001.