Ignoring the fact that it’s a world inhabited by animals, plot-wise I think Zootopia would be a fucking amazing Eremika AU.
Mikasa is a cop that is being racially profiled by the force for being half Japanese and is being given small jobs that leave her frustrated. Her first day on the job, she meets a charming conman named Eren that plays her like a fucking sucker and royally pisses her off so much that she forces him to help her in the first big case of her career that her entire job is riding on.
Bonus scene: Levi is the mafia leader that Eren swindled in the past and sold the rug made of skunk ass hair to.
Eren laughed nervously as he looked up at the piercing blue eyes of his former client. “Oh, hey, Levi. That was a crazy misunderstanding, wasn’t it?” He laughed again.
Levi just glared at him.