Attack on Titan (Japanese: 進撃の巨人 Hepburn: Shingeki no Kyojin, lit. “The Attack Titan”) is a Japanese manga series both written and illustrated by Hajime Isayama. It is set in a fantasy world where humanity lives within territories surrounded by three enormous walls that protect them from gigantic man-eating humanoids referred to as Titans.
Over a century ago, terror rained upon humanity when monstrous giants named “titans” appeared and mercilessly devoured humans. With no other choice, mankind built large walls to barricade themselves safely in and keep the Titans out