Machimaho: I Messed Up and Made the Wrong Person into a Magical Girl! Series by Souryu

Majiba Kayo is a chain-smoking, class-skipping, hell-raising juvenile delinquent and pretty much the last person on Earth you'd expect to be a magical girl. But after a run-in with magical creature Myu, everything changes. Now, when Kayo transforms, neither evildoer nor innocent bystander are safe!

MAGICAL GIRL ON MAGICAL GIRL ACTION!!Before becoming a magical girl, Kayo was rude, crude, and mean. Since getting her powers, she's become even worse! But Kayo isn't the only magical girl in town: Nako has the same power level and is determined to take Kayo down! Will the city survive their battle?!

THE BOYS ARE BACK IN TOWN!Masanido thought his old gang had kicked the bucket in an Atasunmo attack, but suddenly they’re back from the dead…and eager to kick his ass! Does it have something to do with Myu and Mon-chan’s secret plans for Nako, or are there more sinister forces at work?