In the Beginning

The story of a girl who went undercover to catch a thief. The story of a boy that stole for an unknown justice. The story of two friends being torn apart by the secret lives the other doesn't know about. Based on Aoyama Gosho's works. (Mainly of of Nakamori Aoko and Kuroba Kaito from magic kaito but maybe some parts of Mouri Ran and Kudo Shinichi) you don't need to read or watch detective conan or magic kaito to understand this story.