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059100

The Black Collar Ornament Group's MachinationsAuthor: Yamamoto Shūgorō

Original Title黒襟飾組の魔手
Author山本 周五郎
GenreDetective & Mystery
Author TypeMale Author
SummaryUnder the sweltering August sun, Haruta Ryuusuke—baseball captain, amateur chemist, and sharp-witted boy detective—faces an audacious threat. A cryptic black envelope arrives at his school, challenging him to thwart the theft of a priceless diamond necklace from his uncle’s estate by the shadowy Black Collar Ornament Group. Intrigue deepens as a mixed-race messenger vanishes, a bumbling private detective with suspicious habits enters the fray, and eerie vermilion warnings materialize in locked rooms. Ryuusuke’s quick mind unravels anesthetic-laced traps and decoys, but danger escalates: midnight ambushes, disguised henchmen, and a vengeful mastermind from his past emerge. With loyal allies like the brawny Souta and cunning sister Fumiko, Ryuusuke races to outwit criminals who mock his youth. Yet every clue tightens the net—will his scientific ingenuity and baseball-field reflexes be enough? As clocks tick toward a deadly deadline, the stakes soar beyond jewels to survival itself. A duel of wits unfolds, where one misstep could mean catastrophe… or glory.