Okay—Almost Human AU
Inspector Yuuri Katsuki has been working for the Tokyo Metropolitan Police Department for 6 years, since he graduated from university with a criminal psychology degree and a lot of baggage. His parents’ onsen is failing and Mari is doing her best to keep it afloat, but the rapid development of technology has left traditional places behind, so he is under a lot of pressure to perform well or else him having gone to an expensive school to follow his dreams will have been for nothing.
His partner was Phichit—they did training together and had been best friends since. Yuuri is deeply uncomfortable with interacting with Synthetics and has been able to avoid partnering with one because he and Phichit are a dream team. Phichit takes the social side of investigation by chatting up witnesses, interviewing relatives; Yuuri is the one who does the more pound-the-pavement kind of detective work and interrogation of suspects.
And then, one day, they get caught in a shootout and Phichit gets fatally injured—he begs the Synthetic that accompanied them to save his partner, but the Synthetic tells him that the chances of losing Phichit are 100% whereas the chances of losing Yuuri are only 50%—so he gets dragged away from the scene, but loses his best friend and his leg in the same day.
Depressed and still getting used to his new limb, Yuuri goes on a brief hiatus from the police force and heads back home where he is contemplating retiring into obscurity and helping his parents salvage whatever they can of the onsen. Then he receives the call from Chief Superintendent Minako Okukawa: We have a lead on the gang who killed Phichit, I want you to come back. But you need to follow department regulations and it’s time for you to take a Synthetic partner.
Yuuri initially refuses, done with that side of his life, but as the week wears on he becomes more and more agitated at the thought that he’s letting the people who killed Phichit get away. So he calls Minako back to tell her that he’s returning to Tokyo.
And Minako goes: I knew you’d say that sooner or later. He’s on his way to you.
Yuuri is confused, but that same evening someone enters the ryokan looking for him—a face he recognizes—a popular Synthetic called RUS-1225 that had been decommissioned from police work for the last five years, before Yuuri even got his first real investigation.
“Yuuri Katsuki,” RUS-1225 says. “Starting today, I’m your new partner!”