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. The anime follows a group of teenagers living inside cities surrounded by three enormous walls that protect the last vestiges of humanity from gigantic humanoid “Titans” that devour people seemingly for no reason. One day, the outer wall is breached by a colossal Titan and thousands died following the attack, including the mother of Eren Yeager, our protagonist. The show then follows Eren as he vows to join the military so he can kill every single Titan he can find.