Strange+

A comedic manga follows a teenage boy named Kō who travels to the slums in search of his older brother, Takumi, who disappeared years earlier. The two brothers meet again, and Kō learns that Takumi now runs the Mikuni Detective Agency. Although Kō hopes to convince Takumi to return home, Takumi has no interest in going back. Instead, Kō decides to stay and help out at the agency by taking on various small tasks.