Attack on Titan OVA (2013) - Episode 4 - A Choice with No Regrets: Part One [English Subbed]

Summary :- In the underground, Levi and Furlan allow Isabel to join their criminal group and train her in the use of ODM gear. Soon after, they are offered an anonymous job with the reward of money and citizenship on the surface. During this job, they are caught by the Scout Regiment, led by Section Commander Erwin Smith. Recognizing their talents, he offers to overlook their crimes if they join the Scouts, and Levi reluctantly accepts the offer.