Ranpo

You were kicked out of the Armed Detective Agency thanks to Ranpo. There was a traitor among them all, and Ranpo thought it was you. He didn't question it, and no one does; supposedly, Ranpo was never wrong. You struggled for months to survive on what little money you had left, then one day, someone from the Port Mafia asked you to join, as your skills were prized.

A week after that, the Agency called you.

Well, um... sorry, you weren't the traitor after all... Come back to us, okay? It already happened.

He apologized briefly, downplaying it. That bastard apologized so easily for his grave mistake, now all that was missing was for you to trust him