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What If Izuku has One for All but Upgraded?

Summary:

Literally the title, Deku keeps One for All after the final battle but it's upgraded. This contains:
-BakuDeku shipping
-Swearing
-Bad writing
-It is a series
-Updates every Wednesday but rarely Saturdays
If you don't like this kind of stuff, leave. No one is holding you hostage except your own poor life decisions and I can't help you with that. Also I don't know how to write romance, I am aromatic so this probably gonna suck. No promises.
This story is also cross-posted onto Wattpad, but I am the original author.
Please credit me if you want to do a translation or a podfic so I can link it.

Notes:

Timeline: This story happens at the end of My Hero Acidemia end of the final battle. Everything is cannon up until now except All for One is Izuku’s father because this is a what if scenario. Anyway this story starts when Izuku is about to land the final punch on All for One.

Note: I know the paragraphs suck, but I am trying to fix it. The chunks of text get smaller as you go.

(See the end of the work for more notes.)

Chapter 1: Chapter 1: The End of All for One?

Notes:

Discord! https://discord.gg/kCjJ3aDSD

Chapter Text

All for One’s POV:

All Might gave my son One for All, and as much as I hate fighting him, I can’t lose.

He tried to smash One for All and by brother Yoichi into pieces, but I won’t let that happen. I realize I am going to lose this battle but I will leave an imprint of myself in this world and give my son the best gift ever…

Third Person POV:

Izuku with the help of his friends, leaps into the air and goes to deliver the final blow. All for One charges up a fist in preparation and they both attack each other at the same time. All for One was blasted into pieces and Izuku fell to the ground with red tendrils fading away from around him. No one noticed the red tendrils, and the ambulance came a few minutes later to give all the heroes medical attention.

Izuku’s POV:

After I smashed All for One into oblivion, I felt weird. I knew I had given up One for All, but I could still feel it. Not just the embers, there was something else as well. I decided to brush it off as something unimportant because I could hear someone in the room with me. I opened my eyes and saw that All Might was in the other bed in the room and I had a soft bandage wrapped around half of my head. All Might was asleep, so I just laid there not wanting to wake him. As I thought that, I heard familiar footsteps walking to my room with two people trailing behind him. I smiled as he walked in the room. “Hi Kacchan! I’m so happy you didn’t die!” Kacchan looked relived to see I was alive as well, so I patted the chair next to me. “I have something to tell you,” I said. “I had to smash One for All apart in order to win. So, I’m pretty sure I’m going to be quirkless again once the embers die.” Kacchan looks at me with tears falling down his face. Auntie and Uncle (Kacchan’s parents) awkwardly back out of the room and I listen to Kacchan. “I thought,” he said through tears, “I thought I could keep… competing with you… for the rest of our lives…” I watched in disbelief as he kept crying. “It’s ok Kacchan, I’m still going to U.A. with you. Please calm down, your heart needs to rest.” Kacchan sniffs and nods shakily. “Can I stay here?” I nod, “Of course Kacchan! Just make sure the doctor knows.” He SMILES and walks out. I sat there, my brain short circuiting. Did Kacchan just cry AND smile? I was baffled. It’s hard to believe that he used to bully me in elementary and middle school. I sighed and went back to sleep after Kacchan was in the room.

Izuku’s POV:

I opened my eyes slowly to find myself in the One for All mind space. I was confused, was this because I smashed it?
There was no one there, it was just a blank, never ending gray field. I saw All for One appear, but this time I could see his eyes. I saw him with a woman whose face was blurred out, but something about her seemed familiar. I wondered if it was an after effect of connecting my consciousness with Shigaraki. Was I going to see All for One’s past?
I continued watching them. I saw them at a fancy table, then a grassy bank. Suddenly they disappeared and a photo was on the ground. I wanted to walk closer, but 45% of my body was covered in the familiar green black mist. I could only see All for One in the photo, and the blurred-out face of the woman who was holding a baby? As I was inching closer, the photo vanished and All for One appeared in his young adult form before he had lost his eyes and hair. He walked towards me almost identical to how Yoichi(The first user) had first talked to me in this space. He kept coming closer and I didn’t know what to do. I panicked and sat up quickly.
I blinked a few times and realized it was a dream and I was still in the hospital. My sheets were covered in sweat and wrapped around me, proof I was tossing and turning. “Deku! Deku answer me!” I looked over at my side and saw Kacchan next to me looking concerned. “I’m ok Kacchan, just a bad dream,” I reassured him. “What time is it Kacchan?” “It’s 10:00am you nerd” Kacchan replied. “The doctors came in and brought food. Yours is on the side table. Eat it or die.” Kacchan looked like he would in fact kill me if I didn’t eat. He had been like this ever since I came back to U.A (they are in the infirmary for treatment), always insisting I eat and using Sero’s tape to stick me to my bed if I stayed up too late. It was nice, but annoying at times. I thanked him and at breakfast. The doctor came in with Auntie, Uncle, and Mom to tell us that we could be discharged. Kacchan had to take it easy for his heart, and I would need the bandages off my head. We agreed and started the discharge process.

Time skip cause I don’t know anything about getting discharged from U.A.'s infirmary-

Izuku’s POV:

I went home from the hospital with Mom and surprisingly Kacchan. He had talked to his parents and convinced them to let him come home with me, but I think he just didn’t want to be alone. I had the bandages off my head now, and Kacchan still wasn’t over ‘How dumb you look you stupid nerd’. He would totally be dying of laughter right now, but that could literally kill him. He already took 10 photos ‘for blackmail’ he said. I don’t mind, but I really hope my hair grows back soon cause my head is cold. It’s also been hurting ever since I had the weird dream, and every now and then I hear an echo of the word Ninth in my head, and it sounds like Yoichi but I destroyed One for All so it can’t be him. I’ve decided to ignore it and not tell anyone, they have their own problems and my hallucinations aren’t important. They will go away, right?