7つの未解決事件 (7 Unsolved Cases)

Becomes a mystery? Case solved? A detective and the true criminal face off over seven incidents. The existence of the true culprit involved in all the incidents... The showdown between the great detective and the true criminal begins over seven unsolved cases! If the detective solves one case, new facts will be obtained. The investigation is really full-blown. Which faction will be able to read the opponent and control the confrontation?