Possible Plot Idea (Crime, Suspense, Adventure)

It's just another day in the crowded city of Tokyo, and detective Angel arriving to a crime scene where a poor high schooler was brutally murdered. He usually works alone but now the Capitan has now assigned him a newbie who has just rose through the ranks. Now they must work together but considering Angel is usually a person who likes to work alone since he mostly can't handle the immaturity in the station from fellow co-workers, a black sheep in the homicide department. But still not stopping him from being the best detective Tokyo has and now the newbie (Your OC) must help the ignorant and stubborn detective solve the case they now have been assigned.