Fairy Tail

The Fairy Tail Guild faces trouble when they come across a strange Magic called Changeling on their Request Board. This Magic switches the minds and magics of two people into each other's bodies, and if this is not reverted within the time frame of 30 minutes, their minds will remain in the other person's body forever. They are then faced with the challenge of undoing the Magic in thirty minutes, with only Levy to help them. (Source: Fairy Tail Wiki)