Marinette is an ordinary high school student living in Paris. Usually, she's a clumsy and crazy girl, but when she gets in pinch, she transforms into a superhero, "Lady Bug"! Protecting Paris together with her partner "Chat Noir", a transformation of Marinette's classmate Adrien. However, even the person in question does not know each other's identity, and Marinette has a crush on Adrian while Chat Noir has a crush on Ladybug.