Tantei gakuen Q

Notebooks that foretell deaths, numerous urban legends, and murders with no clues... a series of strange incidents occur, and people are lead into a deep labyrinth of mysteries. Five fledgling teen detectives of the Dan Detective Academy, which was founded by the legendary and renowned detective, Morihiko Dan, work together to solve such difficult cases. Stealthily at work behind the strange incidents is an evil crime syndicate called the "Meiosei". (myanimelist.net)