Masakazu Katsura's Shadow Lady #1

By day, Aimi is a painfully shy eighteen year old girl who has trouble even speaking when confronted by a handsome boy. By night, however, she uses magic eye shadow to transform herself into the fun loving and adventuresome Shadow Lady, cat burglar supreme. After her latest heist at the museum (where she steals a trinket from the gift shop), Shadow Lady is confronted by the entire Gray City police force.