Sute-san belongs to a Tokyo detective club composed of young boys, one girl, and her younger brother. This group leverages their collective expertise in intellect, physical prowess, inventive skills, and driving to investigate and resolve urban crimes. Their collaborative efforts consistently crack cases that baffle the local police, notably provoking frustration in Police Chief Nakamura by succeeding where law enforcement fails. Functioning solely within this ensemble framework, Sute-san participates in the club's joint crime-solving endeavors. The character's individual background, specific traits, and personal development remain undetailed across the official 35-episode series, spin-offs, movies, and OVAs.