Shingeki No Kyojin, also known as Attack on Titan, is a popular Japanese manga and anime series created by Hajime Isayama. The story is set in a world where humanity is on the brink of extinction due to giant humanoid creatures called Titans, which devour humans. To protect themselves, the remaining humans live within enormous walled cities. The narrative follows Eren Yeager, his adoptive sister Mikasa Ackerman, and their friend Armin Arlert as they join the military to fight against the Titans. As the story unfolds, they uncover dark secrets about the Titans and the world they inhabit, leading to intense battles and moral dilemmas.