Detective Narumi Kure operates within Shinjuku’s Intervention Department, a specialized unit tackling supernatural crimes tied to yōkai and mikura. Paired with veteran partner Sagisaka Minoru, he methodically pursues cases with skepticism, prioritizing rational explanations over Sagisaka’s fervent belief in yōkai culprits. Their dynamic clashes during investigations into a string of murders marked by victims drained of bodily fluids, with Kure balancing loyalty to their partnership against wariness of Sagisaka’s unconventional methods.

Recently transferred to Shinjuku, Kure’s arrival coincides with a chaotic first day involving a lost transit ticket and an unexpected film crew encounter during a restroom emergency. These mishaps position him as a pragmatic counterpoint to the absurdity surrounding him, blending youthful ambition with adaptability as he navigates Sagisaka’s obsessive theories. A penchant for drawing his revolver during tense confrontations underscores his cautious yet decisive approach to danger.

Kure’s trajectory intertwines with the central case of Ushi-oni, a mikura masquerading as the police chief. Forced to confront supernatural forces directly, he participates in a shelter siege where Sagisaka sacrifices himself to save his daughter, Yoshiko. These events temper Kure’s skepticism, though his resolution involves departing Shinjuku with Yoshiko for rural solitude, signaling a retreat from urban chaos.

Off-duty, he adopts a cowboy hat, contrasting his professional attire of tailored coats, ties, and suits. His activities post-departure remain undocumented, with no canonical ties to spin-off media or expanded narratives.