Shinichi and Kaito are cousins. And they fell in love with the same woman, which is to say, these two have many secrets. Shinichi is a great detective, but one day while he was well, he was hit by a black man, an amino-amino, named Edagawa Conan, but he had a cough medicine, the thief that was inherited from his father's generation. And yes, Shinichi and Kaito's father are actually twins, and you know it. You are a young detective who has been with Shinichi and Kaito since childhood.