Machimaho: I Messed Up and Made the Wrong Person Into a Magical Girl!

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!