Attack on Titan (Shingeki no Kyojin) is a popular anime series based on the manga by Hajime Isayama. It is set in a world where humanity is on the brink of extinction due to giant humanoid creatures called Titans. The remaining population lives within massive, walled cities to protect themselves from these Titans.

Key Points of the Story:

Main Plot: The story follows Eren Yeager, his adoptive sister Mikasa Ackerman, and their friend Armin Arlert as they join the military to fight Titans after their home is destroyed and Eren's mother is killed by a Titan.

Mystery of the Titans: As the story progresses, the characters uncover the truth about the Titans, their origins, and the world beyond the walls.

Themes: The anime explores deep themes of freedom, sacrifice, human nature, and the cost of war. It deals with the complexities of human survival and morality in a bleak, dystopian setting.

The series is known for its intense action sequences, stunning animation, and emotional depth. It also has several seasons, with the final season being split into multiple parts, bringing the story to a dramatic conclusion.