A modern world Giyuu Fanfic Y/N is Rengoku's little sister. The news of both her best friends, Sabito and Makomo are in a coma due to a hit and run accident changed her life. She never would have thought that she would become a police like her brother one day but there she is, in police trainee camp with Sabito's roommate, Giyuu. Well of course there are reasons that made both of them set foot on the path of becoming a police. One, to help Sabito's mom on the hospital fees. Two, only the police department wanted them. Three, to catch the hit and run driver and interrogate the shit out of them because they had a feeling that it wasn't just a simple 'accident'.