Shingeki no Kyojin: Kuinaki Sentaku

Long before joining the Survey Corps, Levi survives in the Underground with Farlan Church and Isabel Magnolia, using extraordinary agility to lead a small criminal group. A nobleman offers the trio citizenship on the surface if they infiltrate the Corps and assassinate squad leader Erwin Smith.

Erwin captures them but recognizes Levi's ability and brings all three on an expedition beyond the Walls. As their secret mission collides with Titans and violent weather, Levi discovers that freedom above ground carries a price far greater than the life he wanted to escape.