To Prevent Fresh Starts - Emily Martha Sorensen

Kendra has her first assignment: to stop a bully at a school for magical girls.  But she underestimates the language barrier, she overestimates her own competence at villainy, and she's not used to fighting without magic.

So attacking an entire school of magical girls may not be the wisest thing she's ever done.

Especially since a villainous fashion designer is watching.