Episode 24

"Fight on, Iida" is the twenty-fourth episode of the My Hero Academia anime and the eleventh episode of Season 2.

Summary
Shoto leaves the ring and encounters his father in the corridor. Endeavor tells Shoto that he is proud of him for accepting to use his fire power and that he has become the perfect upgrade of him. He goes on to say that after he graduates, he will let Shouto become his sidekick. However, Shoto tells Endeavor that he cannot change so easily and hasn't rescinded his disavowal of him. Shoto then says the only reason he used his fire power was because for a split second he completely forgot about him (Endeavor). As he walks away, Shoto says that he needs to contemplate about his fire power.

Izuku is taken to Recovery Girl's office to have his wounds attended to. She scolds All Might for making Izuku push his limits and tells All Might not to try and praise Izuku for going so far. Suddenly, Izuku's friends; Ochaco, Tenya, Tsuyu and Minoru enter Recovery Girl's room, wanting to see how Izuku was doing. However, she makes them leave, saying that Izuku is going to undergo surgery. Izuku, even though he is weak and in pain from his severe injuries, apologizes to All Might for being unable to live up to his expectations and that all he wanted to do was help Shoto after seeing his sadness. Izuku then asks All Might for his forgiveness. All Might responds by saying that his match was simply an unfortunate outcome but praises Izuku for helping Shoto with his problem, saying that reaching out and helping people with their personal problems is one of the principal qualities of a Hero, happy that Izuku has such a quality.

After Izuku's surgery is completed, Recovery Girl warns Izuku not to abuse his power and that she won't heal any more serious injuries for him again. She also asks All Might to find a different method Izuku can use to make better use of One For All. Izuku and All Might leave Recovery Girl's office.

While walking through the corridor, Izuku sadly tells All Might that he thinks that someone else should be his successor. However, All Might reveals to Izuku that he used to be Quirkless just like him, which surprises Izuku. Izuku says to All Might that he never knew about that information, causing All Might to reply that Izuku never asked him. All Might tells Izuku that he chose him to be his successor at first due to him being similar to his former self and admits to Izuku that he has surpassed his expectations after seeing Izuku's actions. All Might says to Izuku that only he will be able to truly shine with the power of One For All. Having been cheered up by his mentor, Izuku apologizes to All Might. All Might tells Izuku to watch the rest of the Sports Festival, to which Izuku complies.

Izuku returns to the stadium where the tournament event is being held, finding out that he missed two matches. Tenya approaches Izuku, glad to see that his friend's surgery went well. Izuku and Tenya chat to each other, about how Tenya defeated Ibara and that his brother has been watching the Sports Festival but cannot watch it fully as a result of busywork.

Meanwhile, Tensei searches an alley and finds what he is looking for.

Meanwhile, Eijiro and Katsuki battle each other in the ring to determine the final contender in the Top 4. Eijiro manages to give Katsuki a more troublesome time than Ochaco did. However, after Katsuki injures Eijiro with an Explosion, Katsuki realizes Eijirou's Quirk weakness; that Eijiro's Hardening weakens with consecutive strikes. Katsuki then assaults Eijirou with a continuous barrage of Explosion which greatly wounds Eijiro and knocks him out, making Katsuki the winner. The Top Four of the tournament event are Shoto, Tenya, Fumikage and now Katsuki.

Seeing that the battle between Eijiro and Katsuki is over, Tenya tells Izuku he will be back shortly as he heads to the ring.

The first match of the semi-finals is Shoto versus Tenya. The match begins with Shoto launching an ice attack at Tenya, but Tenya dodges Shoto's attack by jumping into the air. Tenya activates Recipro Burst and attacks Shoto with a speed-enhanced kick, but Shoto narrowly dodges. Tenya quickly counters and attacks Shoto with another speed-enhanced kick, which slams Shoto down onto the ground. Despite being injured, Shoto grabs Tenya's leg but Tenya kicks Shoto away. Tenya grabs Shoto and proceeds to try and throw Shoto out of bounds before Recipro Burst ends. However, along the way, Tenya realizes that there is ice in his mufflers and he slows down. Shoto tells Tenya that he put ice in his mufflers when he grabbed his leg and freezes Tenya's entire body. Due to being unable to move, Tenya is declared defeated and Shoto advances to the final round of the tournament event. While walking away, Shoto admits to Tenya that he could not fully evade his Recipro Burst and says that he expected no less from it. Tenya calls out to his brother.

Meanwhile, in an unknown area, Tensei is down on the ground with his blood everywhere. In the same area, a mysterious figure is disgusted by the fact that Pro Heroes call themselves "Heroes", saying that they are not worthy of being Heroes. The mysterious figure declares that there is only one person that is worthy of being called a Hero. The mysterious figure comes into the light, revealing a disfigured face covered with bandages. The bandaged figure claims that the only person who is worthy of being called a Hero is also the only one who is allowed to do him in and that Hero is All Might.

The second match of the third round begins. It is Fumikage versus Katsuki. Unlike his previous matches, Fumikage is at a major disadvantage and is forced to go completely on the defensive due to the light from Katsuki's Explosions weakening Dark Shadow and that Dark Shadow hasn't fully replenished its strength. Even worse, Katsuki's fierce fighting style prevents Fumikage from countering. Despite this, Fumikage does manage to keep Katsuki at bay. Tired of his persistence, Katsuki manages to get past Fumikage's Dark Shadow and lands behind Fumikage. Katsuki uses Stun Grenade which causes an explosion around him, hitting Fumikage and his Dark Shadow in the process. After the smoke clears, Katsuki has Fumikage pinned down. Katsuki tells Fumikage that its his fault for telling people about Dark Shadow's weakness but admits that it wasn't a fair matchup to begin with. Although he can still get up and fight, Fumikage, knowing he is at a severe disadvantage, surrenders. Fumikage's surrender causes Katsuki to win, thus the final match will be between Katsuki and Shoto.

Tenya tells Izuku and Ochaco to watch the final match closely for their payback later to which Izuku and Ochako agree with. Tenya's phone starts ringing and excuses himself. Tenya goes to answer his phone in private. Tenya picks up his phone, noticing that his mother is calling him. Tenya apologizes to his mother for losing in his match and that he was too careless. However, Tenya's mother tells him that she is not phoning about that and tells Tenya to stay calm. Tenya is shocked at the news his mother is telling him and becomes distraught; that his brother, Tensei, has been brutally injured by a villain.

Meanwhile, the mysterious figure from before is revealed to be the Hero Killer, Stain, who appears on a rooftop. Stain says that the current society is distorted and twisted and declares that he will make them face reality. After Kurogiri appears, Stain draws his katana and aims it at Kurogiri. However, Kurogiri asks Stain to withhold his blade and says that he has been wanting to meet him due to his notoriety. Kurogiri asks Stain for a moment of his time, teleporting Stain and himself away.

Anime & Manga Differences

 * Tensei and his team searching for Stain is added.
 * The fight between Tenya vs. Ibara and Fumikage vs. Mina is shown and slightly extended.