Daisuke works as a detective with the local police force and happens to be Mikiya's cousin, though he's more of a big brother type in their dynamic. He's got that rumpled, easygoing vibe going on, but don't let that fool you—he's actually a sharp investigator. He caught a case involving a string of bizarre murders that he believes might be connected to someone from Mikiya's high school, and he ends up taking point on unraveling what's really going on. Despite his casual demeanor, Daisuke clearly respects Mikiya's investigative skills enough to loop him in on classified details and ask for his input on the case.
Content compiled by AnimeList.moe from publicly available sources.
