Four weeks after the League of Villains' attempt to assassinate All Might, the students of Class 1-A return to USJ to complete their disaster training. However, unbeknownst to the heroes-in-training, an unexpected foe is lurking within the facility's walls and waiting to strike...

Recap of My Hero Academia's first season, aired a week before the second season.

Story about a joint practice session between Izuku's class and Isami High students at U. A. Academy, takes place after the field training arc in the second season.

UA's sophomore students are undergoing targeted training to prepare for their provisional license exams, and today they will have to take part in a rescue operation. This is just a simulation, but teamwork will be required in order to succeed in the exercise. Except that as soon as the mission begins, a landslide changes the game. The ten students who had split into several groups find themselves trapped by debris. Is this accident part of the exercise? Will the students come out of it unharmed? The survival test has just begun.

The "Hero League Baseball" is an organization set-up by several Pro Heroes to allow them the chance to play and compete in their spare time. For this year, the "Orcas", led by Gang Orca, and the "Lionels", led by Shishido, have made it to the finals. Present Mic narrates the game, accompanied by an extremely apathetic Eraser Head.

It's been ten months since Izuku en-rolled at U.A. High School, and on top of his regular school work, four days a week he has been continuing his Hero Work-Study at the Endeavor Agency. On one day, they are approached by a police officer, seeking assistance in tracking down a local graffiti artist vandalizing the streets.

Class 1-A are bored out of their minds! Stuck in their dorms during the winter season, they can't go out or do anything fun. That is until third year Mirio Togata pays the students a visit with a new card game the support course developed that uses U.A. students as playable characters. Now to pass the time, they'll play this game that's just as tough as U.A. Who will win the card battle?!

After the Quirkless Izuku Midoriya meets All Might, he becomes the successor to All Might's Quirk, One For All, which means he must eventually go up against All For One and Tomura Shigaraki.

All Might's last fight against All For One set off a series of events leading to his retirement as a hero, but he continues to fight, even as the embers of One For All within him die out.

Ochaco and the Todoroki family think back about why they are fighting and reconfirm their convictions as they continue to face off against the villains.

When Tomura Shigaraki was a child, a tragic accident led to the death of his family, which continues to fuel his desire to destroy.