| Ryusuke Tsukumo is a quirky, yet brilliant neuroscientist working for the National Research Institute of Police Science. Wielding a unique perspective and psychology, Tsukumo tackles the nation's most baffling crimes and scandals, going head-to-head with the most brilliant and twisted criminal minds. But his eccentricities and poor social timing can also aggravate people and circumstances, further complicating matters. |
| Name | Character | Episodes |
|---|---|---|
| Takuya Kimura | Tsukumo Ryuusuke | 8 |
| Tetta Sugimoto | Hideki Kojima | 8 |
| Sei Hiraizumi | Junpei Funaki | 8 |
| Haruka Ayase | Kazune Yuri | 8 |
| Tae Kimura | 2 | |
| Ken Mitsuishi | 2 | |
| Gackt | 1 | |
| Shingo Katori | 1 | |
| Koyuki | 1 | |
| Keiko Toda | 1 | |
| Yutaka Matsushige | 1 | |
| Mantaro Koichi | 1 | |
| Ryoko Hirosue | 1 |