Attack on Titan: Junior High

On the very first day of junior high, Eren oversleeps and is woken up by Mikasa. While rushing to school, he runs into several of his classmates. When they arrive at school, everyone except Eren notices something is odd. They realize that they walked into the Titan side of Attack Junior High School, and are later introduced to their class 1-4 properly by Hannes. They attend the entrance ceremony, only to find that their principal unleashes Titans to crash their entrance ceremony.

Eren and Mikasa are sent to collect a club admission form from Armin, who has secluded himself at home all winter for fear of the cold. On the way, a Titan attempts to steal their gifts of food, but is defeated by Levi, who then steals Armin's futon. In an attempt to recover the futon, Eren and his classmates track down the Attack Junior High Scout Regiment, a secret, unapproved club. There they meet Eld, Oruo, Petra, and Gunther. Levi arrives with Armin's futon, which he had stolen in order to mend a tear it had developed, and accepts all of them into the club.

Annie is unable to admit her love of cheeseburgers at lunchtime due to the derision Eren received after admitting to the same thing; due to this, she develops a grudge and vows to defeat him in the next day's dodgeball match. However, when the match rolls around, Eren is late, causing Mikasa to be unable to devote herself to the game. After multiple rounds, only two teams are left: one with Jean, Mikasa, Armin, Sasha, and Connie; the other with Annie, Reiner, Bertold, Ymir, and Krista. At the last moment, however, Eren arrives, allowing Mikasa to give the game her all, battling to a tie with Annie while everyone else is eliminated. Annie finally admits the reason for her grudge to Eren and they make up, just as Connie finally figures out the rules and gets Annie out. Afterward, Eren, Mikasa, Annie, and Armin have lunch together, and Mikasa becomes jealous when Eren and Annie start to bond over their mutual love of cheeseburgers.

Eren and the others are forced to join the Wall Cleanup Club since the Scout Regiment Club is an unapproved club. There, they are tasked with cleaning windows by Rico. Impressed by their work, she agrees to teach them how to use the club's secret equipment, the omni-directional mobility gear. Eren, however, fails the test because of an equipment failure. Hannes, the club's advisor, arrives to show him how it is done, but crashes into the Wall due to being drunk. This allows Rico to save face by blaming the broken equipment on Hannes. Two Titans then appear, and the club watches in horror as they vandalize the Wall. Rico explains that this is why the Wall Cleanup Club was originally founded. Outraged, Eren attacks the Titans, only to end up covered in paint.

Sasha and Conny both fail their tests and ask Armin for help. Conny promptly forgets about the study session, but Armin manages to help Sasha with math by using food metaphors. Meanwhile, Eren, Mikasa, and Jean are forced to listen to Oruo brag about his test scores. Hange then arrives and tries to extort money out of them for lunch. When they ask her why she cannot afford her own, she shows them the two Titans she is keeping captive, forcing her to use up the biology club's budget as well as her allowance to feed them. Levi takes pity on her and gives her a bag of dog food to feed the Titans, which she then eats herself. Later, when the time comes around for the makeup test, Sasha fails due to fantasizing about food, and Conny fails after he forgets to show up for it; causing them both to be forced to take remedial classes.

Jean finds a love letter in his locker and begins to fantasize about who it might be from. Annie approaches him in class, and a similar letter falls from her pocket, but she runs away before he can ask her about it. Later, they find her putting the letter in his locker; when Jean opens it, he finds a message asking him to meet at the park, and runs off. Annie then arrives at the park, and reveals that the letter was not from her, but from a Titan who fell in love with Jean after he gave her food as a distraction while he and Marco fled. Much to his classmates' horror, Jean refuses to accept reality, instead, convincing himself that the Titan is a normal girl. He soon comes to his senses, however, and rejects her; she smashes him into the ground and runs away, vowing not to give up. Sasha tries to console him by pretending that two pieces of food are girls who want to date him, and he retreats into fantasy. The others go home, leaving Marco to wait for Jean to come to his senses.