What is Attack on Titan?

Attack on Titan?

ttack on Titan (進撃の巨人 Shingeki no Kyojin) is a Japanese manga written and illustrated by Hajime Isayama. Devastated by insatiable man-eating giants called Titans, the entire human race has retreated to the safety of a single city protected by 164 ft-high walls. But with the appearance of an immense Titan, humanity realizes that its defenses may no longer be enough, and it teeters on the brink of extinction.

You can watch the animation of Attack on Titan at

Funimation website