This is the alternative ending to the finale. Should be slightly better. You do not miss out on anything besides a different ending.
We are finally done, bitches.
The songs here are Stronger (The Score) and Listen Before I Go (Billie Eilish).
Warnings: Angst, Gore, Blood, Major Character Death

- - -

Izuku immediately sees an opening as Shigaraki is busy with Kirishima.

He comes up to Shigaraki and punches him in the head with his good arm. Shigaraki stumbles and uses Air Cannon against Izuku, causing him to fall to the ground.

Izuku looks towards Kirishima, "G-get out. I got this."

Kirishima, knowing his classmate well, goes to help the surrounding area.

Shigaraki, covered in blood from multiple hits from Izuku and Kirishima, looks at him with shock, "HOW THE HELL ARE YOU ALIVE?! YOU SHOULD BE DEAD!"

Izuku scoffs, slowly standing up while ignoring the pain. He offers Shigaraki a psychotic grin,

"I don't do this for the riches. I'm infected. My condition is I'm always in my head. These words are my religion. I'm obsessed, it's by decision. I'ma do this till I'm dead."

Izuku coughs up blood, while staring Shigaraki down, both obviously weak as neither are attacking,

"Set me on fire. Set me on, set me on fire. I'm still alive. I'm still a, I'm still alive. Bet you didn't think I'd come back to life!"

Both men get into their battled position, gaining as much of a break as possible.

Izuku mumbles under his breathe until his last line,

"Higher, faster, everlasting. Bet you didn't think I'd come back to life. Higher, faster, never-crashing. BET YOU DIDN'T THINK I'D COME BACK TO LIFE!"

The two dash towards each other, dodging a hit from one another.

"Stronger! Bet you didn't think I'd come back to life!"

Shigaraki lands a punch into Izuku's gut, using Air Cannon at the same time to fly him as far away as possible. Izuku barely manages to land on his feet, almost falling from the pain.

Both of them are panting from over-exertion.

"I do this with conviction. I write truths and never fiction. My disease is what you fed. I can't stop with my ambition. Like a missile on a mission. I'm a force that you will dread."

Izuku starts approaching Shigaraki, the man not moving due to Izuku being slow,

"Set me on fire. Set me on, set me on fire. I'm still alive. I'm still a, I'm still a alive. Bet you didn't think that I'd come back to life!"

The two clash into battle once more, this time just attacking each other, not caring if they are hit. They are in too much pain to care anyway.

"Stronger! Bet you didn't think that I'd come back to life!"

Izuku finally sees an opening, and he takes it. Using his boosters, he flies behind Shigaraki and shooters his grapples, grabbing both of his wrists. Izuku uses the grapples to pull himself towards the man and crashes his legs into his back, forcing a large crack to be heard and the man to crash down. Izuku lands on top of him, pinning him down while coughing blood on Shigaraki.

"BET YOU THOUGHT THAT I WAS DEAD, BUT I'M NOT DEAD! I'M NOT DEAD!"

Izuku then realizes that this could be his only chance to end it all. He does the only thing that would guarantee his death due to his possible access to having a healing quirk or obtaining one.

Izuku looks towards Shouta, who has been watching the whole time, shaky. He offers a nervous smile before looking down at the back of Shigaraki's head. He reaches for his baton with a free hand, adjusting it to the highest setting, then whispers,

"Stronger, stronger, everlasting...higher, faster, never-crashing...bet you didn't think I'd come back to life."

Click.

Electricity courses through every revealed part of Izuku's costume, feeling like it is burning him from the inside out.

Below him, Shigaraki is burnt to death.

Izuku finally screams,

"STRONGER! BET YOU DIDN'T THINK I'D COME BACK TO LIFE!"

When the electricity goes away after what felt like an eternity even though it was only a couple of seconds, Izuku checks to make sure Shigaraki is dead.

At confirmation, Izuku collapses right next to the man.

"IZUKU!" Shouta screams as he races over to Izuku. When he bends down, he has to get close to see Izuku's breathing as his body shows no other indicators.

He looks worst than before,

The first thing he does is call the ambulance together, setting Izuku as a high-priority, "Stay with me kid, please! You can't die like this!"

Shouta sets Izuku against him again, starting to clean him up.

Suddenly, Izuku's visor buzzes,

"Take me to the rooftop. I wanna see the world when I stop breathing...turning blue..."

Shouta quickly realizes his visor is speaking for him instead, "Izuku, please. Just wait-"

"Tell me love is endless, don't be so pretentious. Leave me....like you do."

Shouta wipes his own eyes from tea, "I'm staying. If...if you end up dying...I'm not leaving you alone."

"If you need me...wanna see me. Better hurry. Cause I'm leaving soon."

It takes Shouta a moment to accept what it's a high possibility at this point. Telling Izuku that he isn't going to die is just going to make it worst. He lets Izuku ramble.

"Sorry can't save me now. Sorry, I don't know how. Sorry, there's not way out...but down....down..."

Shouta runs a hand through Izuku's hair as comfortably as possible.

"Taste me, the salty tears on my cheek. That's what a year long headache does to you...I'm not okay. I feel so scattered. Don't say I'm all that maters. Leave me. Deja vu."

Shouta watches Izuku try to take a deeper breathe, but ends up hacking up more blood, groaning in misery. Shouta attempts to clean it up, "Be careful, kid..." Izuku reluctantly opens his eyes, looking at Shouta, and Shouta doesn't see a thing. The light is gone.

"If you need more...wanna see me...you better hurry...I'm leaving soon..."

"Kid, I know. But you'll be fine no matter what," Shouta attempts to comfort.

"Sorry can't save me now...

Sorry, I don't know how...

Sorry, there's no way out....

But down...

Down."

Izuku's conversions are becoming slower, and Shouta is start to become worried. Where is the ambulance?! It should be here by now! At least they could knock Izuku out so he can have a peaceful passing if nothing else!

"Call my friends and tell them that I love them...

And I'll miss them...

But I'm not sorry..."

"I will, Izu."

"Call my friends and tell them that I love them....

...

And I'll miss them...

.

.

.

Sorry..."

Suddenly, it goes silent.

Shouta softly calls, "Izuku?"

No response.

"Izuku?!"

Shouta checks his pulse to find nothing.

"IZUKU!"

He checks over him and starts do anything he can to revive Izuku. Just because he is aware Izuku is dying doesn't mean he's going to let him go that easily.

Shouta screams desperatly, hoping Izuku will hear him,

"IZUKU, WAKE UP, PLEASE! YOU CAN'T DIE ON US! THERE'S STILL SUCH MUCH THAT NEEDS TO BE DONE! SO MUCH FOR YOU TO DO! PLEASE!"

- - -

Despite having died, Izuku was able to be revived.

Rephrase, Izuku died multiple times on his way to hospital. Nobody had a clue of how he survived for this long, but they were going to keep him alive.

Eri was asked to come back to heal some of him with her quirk, but she was only able to heal the final shock before becoming tired. Even then, his body was still covered scars from it.

Many doctors with many different quirks came in to heal him to the best of their abilities.

They had to force him into a coma for a week to get his body somewhat functional.

When he did woke up, Izuku learned that he was going to be in a lot of pain a lot of the time.

But he's okay with it. He's lucky he can still move despite some difficulty.

- - -

A Week And Two Days Later

Ever since Izuku got into hospital, Shouta has been by his side nonstop. Of course, everyone, even Izuku's mom, tried to pull him away because he needs to continue his life. After all, Izuku wouldn't want this, and he still has a chance of passing away.

However, Shouta, knowing how illogical he is being, can't. He needs Izuku awake.

He relied on the kid a lot more than he should, but he can't help it.

Shouta was sleeping in a bed that was brought in for him due to him just not leaving when he wakes up to the sound of the heart monitor. Normally, he can sleep through it, but he notices it seems faster than normal.

As Shouta sits up, he finally gets his confirmation that Izuku is going to survive.

"Fuck. I feel like I got fucked by Heather Chandler, shot by Hamilton's killer, and exploded at the same time, " Izuku mumbles softly, but he's there.

Shouta laughs out of relief, "Welcome back to the living, kid."

"Did I die?" Of course Izuku starts off like that.

"Multiple times."

"Damn, they really didn't want me. Now close the goddamn blinds before I I do it myself."

Shouta buzzes for the nurses and closes the blinds.

Before Shouta can speak, Izuku already starts again despite the fact he should shut up," Do I have badass scars?"

Shouta sighs, but he can't help but feel relief at how Izuku is acting, "I'll let you decide for yourself."

Because it means that Izuku is going to be okay.