Easily my favourite among Takahasi Hiroshi's delinquent manga. The later ones all take delinquency too seriously, and make the teenagers out to be way too "big" for what're really just rowdy teens. We have a couple here towards the end that are hard to see as teenagers (King Joe and the future Kurotaki leader), but in his later manga, almost all the characters look older and bigger than that, and all the territory stuff and such is taken way too seriously. He lost a little sense of perspective and scale after this, essentially.