Kyou Kara Ore Wa!! by Nishimori Hiroyuki
Two middle school students, Mitsuhashi and Itou, lived a normal, unremarkable life so far, but as they enter high school, they decide to have a radical change of image, and became delinquents. Similar yet different, watch as they slowly conquers their town, armed with their guts, with and flashy hairstyles!
As a mostly comedic series, the story and art are nothing to write home about, and most of the characters remain pretty static through the series. As a mostly comedic series, however, the protagonist, Mitsuhashi, is without a doubt of one of the cheapest, dirtiest, baddest, meanest, yet funniest guys around, and the various pranks and stunts he pulls off are both hilarious and impressive, if not really commendable. Without a doubt, Mitsuhashi makes the manga, and his presence is enough to make it enjoyable for all of its 38 volumes.
Kyou Kara Ore Wa!! is one of these series that aren't timeless masterpieces, but are a fairly consistent and enjoyable package that makes them fun to read and remember once in a while. If you're looking for some good mix of action and comedy in a high school setting, it should be right up your alley.