Attack on Titan: No RegretsAttack on Titan: No Regrets.

Attack on Titan: No Regrets (Japanese: 進撃の巨人 悔いなき選択, Hepburn: Shingeki no Kyojin Kui Naki Sentaku) is a Japanese manga series written by Gun Snark and illustrated by Hikaru Suruga, based on a visual novel of the same name. The series is a prequel spin-off of Hajime Isayama's popular Attack on Titan (進撃の巨人, Shingeki no Kyojin) manga. The story follows the character of Levi Ackerman before he joins the Survey Corps.