Heisei Busou Seigidan, Sentou Hakai Gakuen Dangerous Recommendations
Monster delinquents, crude humor and lots of violence! Heisei Busou Seigidan is a level above Gakuen Dangerous on the shock factor, it appears to have some kind of political satire in it, and it's only one chapter long, but in return you'll get the cutest gay tsundere delinquent I've seen and a tribute to that shrine maiden in Touhou Project (with original ZUN-style art). No wait, it's from -92, ZUN used this girl as a template?!