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Private detectives have been out of fashion for many years, but that's how Shinjurou Yuuki identifies himself. With his superior deductive powers, Shinjurou solves various challenging cases. Meanwhile, Inga, an attractive young lad, serves as Shinjurou's “buddy”. But contrary to his cute appearance, he's a sharp, arrogant rogue. Why Inga sticks with Shinjurou is not immediately appparent.
The setting of the story is a post-war Tokyo of the future, one that still bears the scars of war. Ruling the land is Media King Rinroku Kaishou, who has the communications infrastructure under his thumb, giving him great power over both politics and industry. Kaishou is renowned for his use of logic and the massive amount of information at his fingertips to solve a great number of mysteries. But unbeknownst to the public at large, most of those discoveries have been the work of Shinjurou Yuuki, "the Last Great Detective." (The public, in fact, regards Shinjurou as a loser, and gives him the nickname, "Defeated Detective".) Still, Shinjurou, together with Inga, can't help but search for the truth."
