She's My Best Friend

(Y,N) and Amy have been best friends since middle school, the two of them both became detectives after their love for cop movies and being bullied. they both went through training together and went to the same precinct from request.

Amy was the only on who knew about (Y,N)'s sexuality well besides Rosa. Rosa and (Y,N) became a thing for a long time until (Y/N) came home after spending the night at her best friends house.