The Phantom Thief and Miss Beatrice

"Beatrice is a cheerful girl who loves food. Gene is her silent and somewhat geeky best friend who has a secret: He's actually the famous phantom thief Auriel! When Beatrice meets Auriel one night in a library and decides to capture the the masked law-breaker herself, their relationship gets turned upside-down as Beatrice gets wrapped up in the dazzling world of secret societies and underground research."