Need new anime and manga recommendations.

[A Bad Clown]

GTO! I'm surprised that many people don't know what it is, yet it's sold millions of copies. It's about and ex-gang member who becomes a teacher to get girlfriends, but he gets stuck teaching middle schoolers who notoriously hate their teachers. Also, the principal doesn't like him because he caught him trying to look up skirts. He somehow gets into all sorts of problems like kidnapping, fighting Yakuza, and recusing people. Well, except for the time where he pretended he was Doraemon and let his students get mugged. After this he made everyone bungee jump off a bridge and scared away the muggers!