Shiba, a detective in the fifth anti-organized crime division of the TokyoMetropolitan Police, a.k.a. "Anti-Gang 5," is on the handgun-smuggling beat. Aso-called handgun confiscation specialist, the most important element of hisinvestigations is the information gathering skills of his undercover informantS. Shiba's "S," Munechika, also happens to be a big-time yakuza. Though he wasaware of the special feelings he had for Munechika, Shiba chose the life of adetective. Thinking of each other, they swear to protect their relationship as Sand detective. But, when a mysterious young man named Black appears beforeShiba, everything falls apart!