S Volume 1 (Yaoi Novel)

Shiba is a detective in the fifth anti-organized crime division of the TokyoMetropolitan Police, a.k.a. "Anti-Gang 5" specializing in handgun seizures. Shiba's secret weapon is "S" ("spy"), an informant who plays a key role inShiba's information gathering.

Shiba is training an informant who has beenofficially accepted into Shinjuku's Matsukura Group within the Budoha crimesyndicate.

One day, Shiba awakens to an anonymous phone call - "Watch outfor your S!"