Returning from their internships, the students of Class 1-A are immediately thrown into more training by their homeroom teacher, Shouta Aizawa. For this exercise, the class will be joining four students from Isamu Academy High School to compete in a survival game. Split up into groups of four, students must either eliminate each other or stay hidden until time runs out to win. The training also acts as a reunion between Tsuyu Asui and her friend from middle school, Habuko Mongoose. However, not all the students from Isamu are friendly—Katsuki Bakugou almost instantly picks a fight with Romero Fujimi. The conflict between the two leads Romero to angrily release his Quirk, a gas which zombifies anyone it comes in contact with. How will the remaining students deal with the situation after most of the people around them turn into zombies?

After an eventful winter break, Kyoutarou Ichikawa and Anna Yamada reunite with a stronger bond. They continue to grow in their own ways, with Yamada taking on more challenging photoshoots and Ichikawa maturing both physically and emotionally as he tackles his affections for Yamada. However, spending time together outside of school allows for their relationship to deepen, and it becomes increasingly difficult to deny their budding romantic feelings. Grappling with these unexpected and new emotions, Ichikawa and Yamada realize that, with the passage of time, their relationship is bound to change—and they must ultimately decide whether they wish to remain close friends or finally become a couple.

UA High School must regain the public's confidence after the surprise villain attack during class 1-A's training session. Although some of the teachers were gravely injured in the attack, Izuku Deku Midoriya and his classmates must continue to learn and train, and utilize their quirks in varying environments and circumstances. Boku no Hero Academia: Sukue! Kyuujo Kunren! follows class 1-A as they attempt to finally complete their training. However, there's a masked figure roaming around the training center. Have the villains responsible for the previous incident returned to finish the job? If so, are the students ready to fight back?

The appearance of quirks, newly discovered super powers, has been steadily increasing over the years, with 80 percent of humanity possessing various abilities from manipulation of elements to shapeshifting. This leaves the remainder of the world completely powerless, and Izuku Midoriya is one such individual. Since he was a child, the ambitious middle schooler has wanted nothing more than to be a hero. Izuku's unfair fate leaves him admiring heroes and taking notes on them whenever he can. But it seems that his persistence has borne some fruit: Izuku meets the number one hero and his personal idol, All Might. All Might's quirk is a unique ability that can be inherited, and he has chosen Izuku to be his successor! Enduring many months of grueling training, Izuku enrolls in UA High, a prestigious high school famous for its excellent hero training program, and this year's freshmen look especially promising. With his bizarre but talented classmates and the looming threat of a villainous organization, Izuku will soon learn what it really means to be a hero.