Ep. 1: Detective Isshiki meets eccentric sleuth Kamonohashi Ron amid ongoing murder investigations

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The Metropolitan Police Department faces difficulties while investigating a series of murders. Despite the ongoing crisis, Detective Isshiki is ordered to go home. Kiku, a member of the General Affairs Division, intervenes and directs Isshiki to meet a specific individual. This person is described as a shaggy-haired eccentric named Kamonohashi Ron, who operates as a sleuth. The directive shifts Isshiki's focus from the immediate police struggle to this new encounter, setting the stage for a collaboration between the detective and the unconventional consultant amidst the unresolved criminal cases.