In where our precious Kou minamoto comes from a 97% success rate family of detectives. The Minamoto's are known to have amazing deduction skills, as expected. What would happen when Kou minamoto finds himself obsessing with the issues his colleague, Mitsuba Sousuke, faces? What would happen when he gets mixed up in that mess? How would the fact that he only will be allowed to see Sousuke for two months affect how he interacts with him?