Detective AU Rui Kamishiro, is the only consultant detective in London, he is very, very smart, but he... you could say, likes to show off about the results of his observations to his assistants, Tsukasa Tenma Actually Rui didn't have an assistant, so how did he get one?.. well.. It all started from when.. when Rui was examining a corpse in the forensic lab, there was a guy who visited it. Rui just looked straight at him but after that he continued to observe the corpse