A Choice with No Regrets: Part Two

A Choice with no Regrets (Part 2) ( 悔いなき選 Kuinaki Sentaku ) is an OVA, episode 0.5B, of the Attack on Titan anime. It was produced by Wit Studio and Production I.G.

Overview
Levi and his friends Farlan and Isabel have joined the Survey Corps and are assigned to Flagon's squad, much to the latter's displease. As the Survey Corps begin preparations for the 23rd Expedition beyond the Walls, the former thugs plan to kill Erwin Smith and steal the documents during the expedition. Levi initially hesitates, worrying for his friend's safety, but they convince him to trust them and they join the expedition. However, during a heavy rain, the Survey Corps are attacked by a Deviant Titan which kills Farlan and Isabel. After Levi kills the Titan, Erwin reveals he knew all along of the true intentions of the trio, and encourages Levi to not regret his decisions. Levi then decides to keep following him.