Akogare no Keijibu ni Haizoku Saretara, Joshi ga Oni ni Tsukaretemashita

A rookie teamed up with an older, listless boss in charge of "mysterious cases" ?! Iwatsuki Asusa, whose dream was to become a detective, is assigned to the somewhat suspicious "Special Investigations Unit." What's more, her boss is said to be "possessed by a demon"