On the trail of a missing husband, private investigator Goro crosses paths with a deranged killer.
 
(Source: Anime News Network)

Manga about detective Nanase Gorou, 25. He works in a private detective agency and solves many complicated cases. Not only criminal ones, but social ones as well. 
 
Note: 
- The chapter count includes 2 non-numbered chapters in volume 24. 
- Includes the one-shot "Mirai-hen: Kanata Yori Ai wo Komete (未来編　彼方より愛をこめて)" 
- Includes the story "Harinezumi Kouyuuroku (ハリネズミ交遊録)", 17 chapters 
- Includes the story "Roppongi Shinjuu (六本木心中)", 2 chapters

Kyuusaku Kogure