Saitou Banjou

In Nanshu City, there are the "Four Kings of Nanshu," the baddest of bad boys. The strongest of the Four Kings, Yoshio Hitoshi, is actually a hard-core fan of the magical girl anime Merry Nature! By the way, his favorite girl is the cherry-red one called "Haruma." Yoshio just wants to live his otaku life in peace, but today, as usual, he gets tangled up with the other delinquents in town. This is a story of a delinquent who wants to be an otaku, and his life full of ups and downs!

(from Michikusa Comics): Tsukushi, the world's weakest bancho, meets the world's strongest elementary school girl named Warabi.......! When they are together, there is nothing to fear! A yankee gag manga of unparalleled caliber!

A member of the yakuza comes across a magical wand - one that would normally be bestowed upon a young girl. Shenanigans ensue.