After his lunch is eaten by a Titan on the first day of junior high, young Eren Jaeger vows to destroy the human food-stealing creatures with the help of his classmates and hilarity ensues.
The story follows Eren Yeager and Mikasa Ackerman entering Titan Jr. High, a school where humans and Titans study in the same area in coexistence. Because of a "traumatic" event, where the Colossal Titan ate his lunch back in middle school, Eren hates the Titans, and is constantly trying to find a way to rid the earth of their kind. Because of this, he has a hard time making friends, much to Mikasa's worry.