Ryotarou Dojima

Serving as the protagonist’s dedicated caretaker and a diligent detective, this single father struggles to balance his professional duties with raising his young daughter, Nanako. Alongside his partner Adachi, he remains consumed by the unsolved hit-and-run that claimed his wife's life. This obsession often leads him to neglect his family, eventually forcing him to confront the painful truth that he has been using the investigation to avoid the emotional responsibilities of parenthood.