A Choice with No Regrets: Part One

A Choice with no regrets (Part 1) is an OVA, episode 0.5A, of the Attack on Titan anime. It was produced by Wit Studio and Production I.G.

Overview
Within the underground district beneath the walls, Levi Ackerman and his partners Farlan Church and Isabel Magnolia are seen evading a small group of Survey Corps soldiers, including Erwin Smith and Mike Zacharius. At an earlier time, Farlan is shown distributing money to comrades, shortly after they leave, Isabel appears at the door seeking shelter from pursuers. Levi and Farlan then fend off the pursuers and shelter her. They later take in Isabel and train her to use Three Dimensional Maneuver Gear. Soon after, they are offered an anonymous job with the reward of citizenship on the surface. Returning to the chase between the thugs and the Survey Corps, Levi begins to fight with Erwin before he is forced to surrender due to his comrades capture. After a brief interrogation, Erwin offers Levi and his comrades an opportunity to join the Survey Corps.