Yuko Sae Tatakaeba

Every few centuries, 496 demons of the demon world, each choose a human who will fight each other in a tournament of sorts called "Diabloli". Our main protagonist is a little high school girl who was chosen by the demon she dubbed "Gi-chan". She was given the power over fire and allowed one wish. She wished to go to school. This is the comedic, action packed adventure filled manga.

(Source: MU)