2005/High School/Martial Arts/Violent Titles

High School student Shinichi Kudou was a virtual Sherlock Holmes, who the Tokyo police regularly turned to for help in solving baffling cases. But then he accidentally learned too much for his own good about a murder case, and was caught by the villains. They poisoned him and left him for dead, but the "poison" had an unexpected effect--rather than killing him, it caused Shinichi to revert to the appearance of an elementary school boy! He retains his skills as a brilliant detective, however, and since that incident has managed to become adopted by his former girlfriend and her less-than-exemplary private detective father. With them he carries on his passion, and searches for clues to a possible antidote to the poison he was forced to swallow.