Hazuki Mei, a rookie detective assigned to the Metropolitan Police Department's Investigative Division 6. Despite her petite, doll-like face and inexperience, she possesses both courage and K-cup explosive breasts. Thrown into various complex cases and rushing headfirst into crime scenes, she somehow always manages to solve them. It seems her unique combination of a youthful appearance, fearless yet gentle personality, tendency to give in when pressured or asked for help, and her massive breasts are mysteriously contributing to one of the highest arrest rates in the entire precinct.