"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 that devour people. To protect themselves, humans live within enormous walled cities. The narrative follows Eren Yeager, his friends Mikasa Ackerman and 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 history of their world, leading to intense battles and moral dilemmas.