Chiharu Nara: 4 books

At the end of S volume 3, detective Masaki Shiiba was last seen running away from the hospital room of his injured S, Keigo Munechika. Now, Shiiba has turned in his resignation, bought a gun of his own, and is bent on only one missionto kill Takanari Godou. He vows to get the truth from Godou, even if...

For almost a year now, Shiiba has been using Keigo Munechika as his S, his spy, to get information on the gun dealings of the Yakuza world. Shiiba uses his body in exchange for Munechikas sensitive information...and only his body as far as Shiiba is concerned. Shiiba vows their relationship will not...

Detective Masaki Shiibas informant or S, Keigo Munechika, has proven himself to be an excellent source of information. But the payment of sex for every lead given is taking its toll on Shiiba. But with his new assignment as back-up to a fellow undercover detective, Shiiba learns that there are far...

Detective Masaki Shiiba must work the dangerous streets of Kabukicho, Japan's largest red light district. When an increase in gun crimes forces Shiiba to work undercover, he must forge an alliance with an "S" or spy, who turns out to be an influential man from the Matsukura Group. But when Shiiba gets...