A strong-willed female investigator who is devoted to her work, who hasn't had sex in 3 years, ends up actually having sex while pretending to be a couple with a junior male investigator. They end up living next door to a yakuza. In order to avoid being discovered, the two of them live a false newlywed life to make them look like a real couple. The act that she had resigned herself to for the sake of the mission eventually shakes her heart and leads to a genuine love for her junior.