-Reader-

"Huh..so Shoto lost."

Izuku:"Yeah..."

"Hey, don't beat yourself up about losing to two face earlierl. It's really no big deal. You screwed him up by using your cheek to flick your finger for crying out loud!"

Izuku:"That still hurts like hell. *chuckles*"

Present Mic:"F/n L/n, versus, Katsuki Bakugo

"Huh...? Looks like I'm up."

Izuku:"Good luck F/n, I really hope you win."

"Thanks, Broccoli Head!"

Earlier....

In the aftermath of Izuku and Shoto's showdown, Katsuki finds himself annoyed as he overhears fans discussing the battle. Shoto exits the arena and encounters his father in the corridor. Endeavor praises Shoto for using his fire powers and offers him the chance to become his sidekick after graduation. Shoto ignores the offer and reveals he hasn't rescinded his disavowal of his father. He says the only reason he used his left side is because he forgot about Endeavor completely during that moment. As he walks away, Shoto says he remains unsure about his fire power and suggests he may not need Endeavor at all. 

Izuku is taken to Recovery Girl'stemporary nurses office where she informs Izuku that he has gravely injured his arm and requires surgery. She disapproves of Izuku pushing the limits of his body and scolds All Mightfor encouraging him to this point. Tenya, Ochaco, Minoru and Tsuyuabruptly enter the room to check on their friend. They inform him that matches have been postponed to repair the arena. Recovery Girl forces them all to leave so that she can prepare for surgery, further worrying the group. Despite being weak and injured, Izuku apologizes to All Might for letting him down, having focused more on helping Shoto then actually trying to defeat him. All Might replies that although Izuku was defeated, he still helped Shoto realize something very important about himself and states that meddling where someone doesn't have to is the essence of being a hero. 

Recovery Girl removes Izuku's friends from her office after they check on his condition

The matches resume with the next one on one of the second bracket: Tenya vs Ibara Shiozaki. She tries to attack using her vines, but Tenya opens up the battle using his Recipro Burst and quickly runs her out of bounds to win the match. Then, Fumikage scores an equally as quick victory by pushing Mina out of bounds with Dark Shadow. Tsuyu and Minoru comment on Fumikage's overwhelming strength and Ochaco remains concerned about Izuku's condition.

Izuku is healed enough by Recovery Girl to walk, and realizes that his hand has been permanently damaged from overusing his Quirk. Recovery Girl warns Izuku and All Might that she will no longer heal these self inflicted injuries anymore, and insists that they find a new way for Izuku to use One For All.

All Might leads his protege office and ponders Recovery Girl's suggestion. Izuku interrupts, suggesting that All Might find a new worthy successor because there were other competitors who gave the Sports Festival more effort then he did. All Might agrees that there are a number of incredible talents at the school, but then reveals that he was Quirkless as a young man just like Izuku. Izuku is in disbelief the Number One Hero was once without a power of his own, and All Might tells Izuku that he reminds him of his former self. He goes on to praise Izuku because he has exceeded expectations repeatedly, and even says that he believes Izuku will do incredible things with One For All one day. Encouraged by his mentor, Izuku promises to do his best, and they both return to watching the remainder of the Sports Festival. 

Tenya tries to contact his brother Tensei after his match to discuss his victory, but Tensei is off on a mission and sends his brother to voice mail. Tensei is searching Hosu City and eventually locates and confronts the Hero Killer: Stain. Izuku returns to the stands in time for Katsuki and Eijirl match but is upset he missed both Tenya and Fumikage's victories. Eijiro grazes Katsuki's cheek, cutting it open, and the latter counters with an explosion to Eijiro's side. Eijiro's hardening ability negates Katsuki's attacks, allowing his to draw out the match. Izuku is shocked to find that Katsuki is on the defensive, being forced to evade Eijiro's flurry of punches. Tenya happens upon Izuku, who congratulates him on his victory and suggests Ingenium must be proud. He tells Izuku that he tried to inform Ingenium but to no avail, and that he will hopefully be able to later notify his brother of further victories in the festival. 

Katsuki counters Eijiro again, and this time he is able to do some damage despite Eijiro's hardened skin. He surmises that Eijiro's hardening gets weaker with every blow delt and that his opponent has been straining to keep his entire body hard throughout their match. Katsuki capitalizes by barraging his opponent with a series of explosions until Eijiro eventually succumbs and falls unconscious. Tetsutetsu watches disapprovingly, having cheered on Eijiro throughout the battle. With Katsuki's victory, the final four remaining contestants are Shoto, Tenya, Fumikage and Katsuki. 

Tenya leaves for the his match and Izuku returns to the stands with Class 1-A. Ochaco is anxious about Izuku's condition, but he tells her he wants to watch the remaining duels because this is where all of his peers efforts pay off. The bout between Shoto and Tenya begins with the former trapping Tenya between two rows of ice. He goes for another ice attack, but Tenya evades using a standing long jump and activates his Recipro Burst technique in mid-air. Shoto is able to evade Tenya's initial roundhouse kick, but falls victim to the subsequent attack thanks to Tenya's blinding speed. Tenya tries to swiftly carry Shoto out of bounds, but is stopped suddenly. He realizes that his mufflers have been frozen, and questions when Shoto did so.

Shoto reveals that it was after getting hit with Tenya's second kick and suggests that Tenya had forgotten his ability to freeze with precision because he's only been showing off ranged attacks during the festival. After freezing Tenya's body completely, Shoto admits that his opponent's Recipro Burst was too fast to dodge. Shoto is declared the winner, and Tenya grudgingly apologizes to his brother. 

Elsewhere, Ingenium falls victim to the Hero Killer, who claims that All Might is the only worthy to call himself a true hero. Back at the festival, the duel between Katsuki and Fumikage is ongoing, with Fumikage is being forced back by Katsuki's constant attacks. Momo and Mina comment that Fumikage battled much harder when he faced them, and realize that there must be a reason for his timidness. Izuku and Ochaco know that Fumikage's Quirk is weakened by light and state that Katsuki may not have figured it out yet. Fumikage mulls over Katsuki's brutality, worrying that he will soon run out of darkness. Katsuki continues to strike dark shadow and it attempts to grab him, but he evades and maneuvers behind Fumikage before unleashing his special move: Stun Granade. Katsuki exploits Dark Shadow's weakness by covering the ring in light before pinning his opponent down. Fumikage asks if Katsuki knew his weakness all along, and Katsuki replies he figured it out by attacking repeatedly.

Having been bested, Fumikage surrenders, allowing Katsuki to move on to the finals to face Shoto. Denki and Hanta are surprised by Katsuki's victory and Eijiro comments that Katsuki was the perfect person to exploit Fumikage's weakness. Itsuka teases Neito for making enemies out of Katsuki, but he replies that Katsuki was just lucky he got a matchup where his Quirk worked well against his opponent's.

Tenya reunites with his class, greeting Ochaco and Izuku with a smile until his phone rings. He pardons himself to speak with his mother, who informs him that his brother has been severely injured by a villain.

In the waiting room, Shoto ponders the conflicting thoughts of his mother's breakdown and Izuku's encouragement. He's interrupted when Katsuki abruptly kicks in the door and berates him for being in the wrong room. Katsuki realizes that he's actually the one in the wrong waiting room, but decides to stay when he's irritated by Shoto's lack of acknowledgement.

Katsuki tries to intimidate Shoto by slightly blasting the table and warning him to do his best. Shoto replies that Izuku told him the same thing, and comments that he was foolish for trying to help him rather then winning the match. He asks Katsuki if Izuku was helpful during their childhood, but this only infuriates the former. Katsuki kicks over the table and yells for Shoto to ignore Izuku and his family issues so that he can use his fire during their bout. He angrily exits the room and states he wants everyone to know he beat Shoto at full strength. 

The final battle of the U.A. Sports Festival begins with Shoto using a more controlled version of the giant ice attack he defeated Hanta with. Katsuki endures the ice blast by tunneling through it using his explosions. Katsuki rushes Shoto, commenting that his attacks are powerful but he has bad aim and needs to try harder. Shoto moves to counter attack, but Katsuki evades using a mid air explosion and grabs onto Shoto's left side before throwing him.

Shoto creates and surfs an ice wave to avoid going out of bounds. Katsuki attacks again and Shoto is able to stop him by evading his blast and grabbing onto his forearm. Rather than using the flames in his left arm (the same arm he used to grab Katsuki), he simply tosses him away. This only angers Katsuki, causing him to ask if he's unworthy of Shoto's flames. 

Aizawa comments that Katsuki is continuing to show his aptitude for battle during the fight, but Shoto appears to have lost his spark after his match with Izuku. Aggravated, Katsuki demands Shoto use his fire so that he can defeat him at his best and prove that beyond a shadow of a doubt that he is the strongest student at the festival.

Shoto mulls over his opponents words, internally apologizing to Katsuki because he is still too unsure about what his left side means to him to use it. Then suddenly, Shoto is once again encouraged by a shouting Izuku, who tells him not to give up and to do his best. Impassioned once again, Shoto ignites his flames and prepares to counter Katsuki's next move. Katsuki is excited to see Shoto's fire and readies his special move: Howitzer Impact. Just as the two superpowers are about to clash, Shoto thinks about his parents and extinguishes his flames, leaving himself completely open to Katsuki's powerful explosion. 

Once the smoke from the blast clears, Katsuki realizes Shoto didn't use his fire and has been blasted outside the ring. He runs over to Shoto even though he's unconscious and furiously demands that he get back up and use his powers because a victory in this manor is meaningless. Midnight uses her Quirk to knock Katsuki out and signals Present Mic to call in F/n L/n.

-Reader-

"Alright."

I smiled and got up the fighting square. The ring started to play something amazing for the final battle.

Present Mic:"Oh MY dear God!!! This will be the battle of awesomeness everybody!!!"

Midnight:"Fighter's ready?!"

I got into a running stance as Katsuki smirked menacingly. I stretched my arms as Midnight gave the signal.

Midnight:"FIGHT!"

Present Mic:"And the fight begins!!!"

I quickly ran up to Katsuki and managed to disappear from everyone's vision.

Present Mic:"WHOA! THAT WAS FAST!"

I appeared behind him and tried to throw him out of bounds but he learned where I was and used his Quirk to blow me up. I swiftly avoided his hand that was ready to explode and gave him three quick jabs. I didn't notice his other hand managed to blow me away using his Quirk.

Present Mic:"Ouch! That's gonna hurt in the morning!"

"Argh..!"

I groaned as I got blasted away, but not enough to put me out of bounds.
Katsuki's smile grew even larger as he propelled himself to me.

"Got a kick in you, I'll tell you that!"

I smirked and ran towards him at the same speed. As our superpowers reached each other, both of us started rapidly striking each other.

Katsuki was striking me with a  powerful explosion barrage while I used my speed to rapidly jab him. I duck under his incoming hand and landed an uppercut on him.

Present Mic:"A powerful uppercut was made!"

But Katsuki used his free hand the land a solid explosive punch which blew my face up and threw me just near the line. I sit up and stood up again. My face was burned and bleeding slightly.

Present Mic:"What a punch!!"

"You're right about that.."

I smirked as my injuries began to heal instantly. Katsuki was beyond pissed so he wanted to finish this sooner. He charged at me with his hands clenched while sparking.

He jumped up and kept beating the daylights out of me but my Quirk kept healing that gruesome injuries I got from each punch. I then made my arms vibrate so fast as I punched Katsuki away.

He was sweating, Katsuki glared his menacing look at me again and blasted another explosion at me. It got my uniform shirt which burned onto the ground.

My injuries were slightly stinging on that one, as I look to my right arm and right side of my abdomen, they were burnt black.

I winced at the pain as my Quirk slowly recovers my skin. Keyword: slowly. I sighed and charged at the running Katsuki with murderous intent.

I then threw a left hook as I saw him use his Quirk to dodge it quickly. His smirk grew wide and blasted a powerful explosion which roasted my whole body. Sending me unconscious...