My best friend is a Magical Girl superhero?!
They were friends as long as he could remember. They liked to call themself the Brains and Brawn Duo. Or the B&B. She(YC) always defended him from bullies, being a tough as nails tomboy, who didnt take shit from others. While he(MC) he was her smart bestfriend,who helped her with schoolwork. But what made their relationship different? She was a magical girl. They also had to deal with this pervy tiny cat who gave her the powers. 
Being a superhero isnt easy, and after a certain battle  its gets worse. Now that HE becomes a magical girl too! Not to mention they now have a team.
-This will be multiple characters
-This idea is a work in progress