The First Investigation Division of the Metropolitan Police Department, which is based in the Dai-Tokyo Police Station , is headed by Keiichiro Funakoshi, the Chief of the First Investigation Division . This is a department that specializes in considerations that lead to solutions. Along with Ryu Fujii , a new detective who was newly assigned for some reason , they lead to the solution of many difficult cases one after another while colliding with each other's strengths.
| Directing | Smith | Director |
| Directing | Takahiro Aoyama | Director |
| Directing | Hiroto Totsuka | Director |
| Writing | Yasushi Akimoto | Screenplay |
| Writing | Takehiro Yashiro | Writer |
| Production | Kentaro Yamato | Production Director |
| Production | Honma Kanami | Producer |
| Writing | Takeshi Takemura | Writer |