Katou Miaki

Kosuke Hasumi, an ace detective at the Sakura-machi Central Police Station of the Tokyo Metropolitan Police Department, is partnered with Eiji Kikkawa, a detective who was transferred from the Organized Crime Division, commonly known as "Maruboshi. Hasumi is bewildered by the gangster-like Eiji Kikigawa in appearance and behavior, but one day, while investigating together, Hasumi learns of a serious secret from Kikigawa. Kikukawa, who wants to take credit for his return to Marutoh, presses Hasumi to "cooperate with me in scoring points in exchange for keeping the secret quiet. On the other hand, Kosuke, who wants to achieve a certain goal, accepts and says, "If you want to do that, I'll use your connections and experience."

Working at Kaikarou in the red-light district of Edo Yoshiwara, Ikutarou finds himself among many beautiful women. One in particular, Fuyou, seems to have been gifted with not only beauty but intelligence as well. An intelligence that people from many walks of life secretly turn to when they cannot go to the police. After discovering this secret, Ikutarou is made to be Fuyou's "feet," made to go out to observe crime scenes and evidence to report back to Fuyou so that she may solve the case even while being forbidden from leaving Kaikarou. Will this impromptu partnership work out? Will Fuyou be able to solve the case?