A/N: Ok, I've made a decision. When MC gets a new harem member, he will wait for the trust between them to deepen a lot before MC will tell them about his past.

HOWEVER! I would like to tell Nejire about MC's past a bit early. It would feel weird to have Momo and Rumi aware of MC's past but Nejire is still clueless. Let me know what you think!

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All for One- “Enough! You’re no longer needed here!”

All Might and All for One have been fighting for a few minutes now. Once All for One confirmed that the League of Villains has successfully escaped, he decided he no longer needs to fight All Might. So, he used his shit (literally) teleportation quirk and just yeets All Might outta here.

Fuck, this All for One is smart! Is it another butterfly effect? I was thinking he would continue duking it out with All Might. I realise it’s a dumb thought, but I could hope, right?

All Might disappeared in some black sludge that poured out of his mouth. From my understanding, that quirk can teleport people to the user and also send them away. However, this quirk can only be used on people who are considered to have a close relationship with the user.

Tomura fits this category, obviously, and thinking from a certain perspective, All Might also happens to fit into this category. 

All Might disappears in under a second. I can take solace in the fact that this teleportation quirk also has a low range, but it will take a bit of time for him to get back nonetheless. It seems it’s my turn to step in. Honestly, it’s the first time I'm interfering directly with important events. 

In the USJ invasion, I just saved the other students and supported everyone else. In the Training Camp Invasion, I only dealt with Spinner before hiding at the back and pulling some strings.

This is the first time I'm going to be directly fighting head to head without any support against an important character. And honestly… I'm quite excited. Am I becoming a battle junkie?

I walk towards All for One while smiling due to the excitement, but he can't see it due to the helmet I'm wearing, obviously.

No need for words. I step on the ground instantly appearing in front of him and punch him right in the face. As if expecting something like this, he raises his hand and blocks the blow. 

Bad Move.

[Vector Manipulation]!

*Crack!*

I back off and look at the work of art I just made. All for One’s whole arm is twisted and broken in many different places. This is why you shouldn’t touch a Vector Manipulator. It will never end well.

All for One- “Oh dear, straight into the fights now, are we? Is this what they’re teaching you at school?”

Arata- “Not exactly but I'm sure they’ll make an exception if it's you.”

All for One’s arm twists back and is completely healed. That’s some broken healing abilities, honestly, I'm quite jealous. I wish I had something like that… oh well, can't complain, I could easily completely shatter his entire body.

All for One takes the initiative this time and fires off one of his favourite Air Cannons boosted with many other quirks at me. Leaning backwards, I allow it to easily fly over me. The destruction it caused behind me isn’t a laughing matter though.

We turn this into a ranged fight as All for One fires one Air Cannon after the other at me while I take out metal coins from my suit and inventory and fire many Railguns at him. I dodge all his Air Cannons and All for One dodges and sometimes blocks all of my Railgun shots. 

I mean, super regeneration or not, I'm sure he doesn’t have a pain nullification quirk so it will hurt nonetheless.

*THVIIIIIIM!*

*FWOOOM!*

The sounds of our attacks ring out one after the other causing destruction wherever we aim them. There are no random civilians so I don’t need to worry about getting nagged that much. I'm constantly running around All for One in a wide circle while firing Railguns while he is standing still, firing more Air Cannons.

Does he not have any other long-range attack? Oh well, I guess I’ll get a bit more serious. I've only been using one hand after all.

*THVIIIIIIM!*

*THVIIIIIIM!*

I fire off 2 Railguns simultaneously. Not expecting it, he barely blocks one of them before getting pierced in the side by the other.

All for One- “*Cough* No bad. Is this another utilisation of your quirk? Honestly, I am very jealous. I want to take it…”

Creepy old fart you’re not getting shit from me. Even if I do get caught, [Gamer’s Body] will make stealing it a meaningless affair. My body is that of a game character, after all. I don’t bleed and I rarely tire myself out because my body is just ‘data’. Your All for One quirk doesn’t allow the stealing of ‘data’, right?

All for One- “I'm quite surprised a student can keep up with me this far. Shall we take this up a notch?”

This time, All for One is the one who jumped towards me. Using some quirk, within a few seconds, the large distance between us immediately shortens to just a couple of meters as he grabs out at me.

Shit! He’s too fast, I won't be able to dodge!... is that what you thought I would’ve said?

I've never even used [Vector Manipulation] to augment my speed or strength in this fight yet, everything I did was just with my natural stats. Of course, I'm not going to start now either. After all…

You shouldn’t underestimate 90 levels in [Unarmed Mastery]!

I tilt my head and easily pass his hand. I step forward and drag my fist through the air along with my body before throwing it forward and punching All for One right in the chest.

*BOOM!*

I'm not done here though.

[Vector Manipulation]

*Thlat*

A 30cm diameter hole appears through All for One’s chest, I can see the scenery behind him through said hole. The moon… looks quite beautiful. I wonder why I thought that?

All for One had blood dripping out of his life support through his mouth. Of course, I don’t believe this will kill him, but as Izuku said, all quirks are a part of your body. All for One should be no different. If my scans through my neuro linker aren’t wrong, his super regeneration should be fueled by his stamina. So, he can't endlessly regenerate. Just tire him out, and I can win.

All for One- “*Coughs blood* Interesting. Very interesting. Your Vector Manipulation is this strong? Colour me surprised. I think that settles it… I’ll be taking that quirk of yours.”

Arata- “You’ll have to kill me first.”

All for One- “Don’t worry, I plan to. I guess it’s time to get a little serious…”

[Sixth Sense] flares up and warns me to quickly move. All for One instantly appears in front of me and stabs out with his hand as if it were a dagger straight towards my chest.

I wasn’t prepared for such speed, I was still in a stance for a long-range fight so I couldn't bring my arms up to block in time, neither was I able to move my body completely out of the way.

I was able to shift my body slightly, but he’ll still end up hitting my shoulder. Normally I wouldn’t be scared in the first place, [Vector Manipulation] can just reflect whatever’s coming my way. But [Sixth Sense] never stopping warning me, furthermore All for One’s Divine Augment came to mind all of a sudden.

Destruction Attribute.

With those reasons, I knew I couldn't let him touch me. So, I ended up using something I made to be used in a just-in-case scenario. And right now is such a scenario.

*Shing!*

*Klang!*

All for One’s hand stop its advancement towards my shoulder. The reason was the 4 pitch black with silver highlights spider-like robotic arms sprouting from my back.

That’s right. It’s fucking Spiderman's spider arms. 

DJDAN

A/N: Iron Spider's robotic arms, I always wanted something like this.

MC: Too bad, it's mine.

AN: You cant give them to me?

MC: Nope. Why would I? You shot me.

AN: You shot me first, fucker!

MC: Details, details...

AN: Anyway, Im curious, what did you do last night? I heard some noises...

MC: Oh, I was-

AN: Find out next chapter, readers!

MC: Oh come on!

Let me know if I missed something!