Head into the refectorie of L’Academie de Notre Maitre des Medailles to find a teacher with a request for you. She recently found an old book with a riddle and wants you to help her decipher it.

Head out into the Schoolyard and search amongst the field of flowers to the southwest of the entrance, you’ll spot a gold Sparkly Spot which when interacted with, will recover the mystery box. Deliver the box back to the teacher to complete the quest and receive the useful Belle’s Bow (+MP Recovery for Jade).