Chapter Text
It's been quite a while since All For One has been locked in at Taratus, the highest security prison in Japan.
He doesn't get visitors very often, not at all, actually. So that's why when principal Nedzu and All Might came into view, he was a little surprised. Right behind them, Eraserhead and Present Mic were following closely.
"All For One." All Might kept his voice steady, staring All For One down with such hatred no one could comprehend. "Principal Nedzu.. had a few matters to discuss with you."
"What a pleasure to talk again face to face, All Might."
"All For One. That is your real name, right?" Nedzu spoke with his usual calmness, sitting down on the chair right in front of the glass barrier separating them from the demon lord. "We've, well I, got an offer for you. You'll get back your freedom, only under some conditions."
"I am all ears."
"We put you in a better condition. We get rid of your quirk and you come to UA." Nedzu explained. Eraserhead was burning behind him. This bastard has put his students in such a lot of trouble these months. "We could use an addition like you at our school, All For One. Ex villain redeems himself and gets hired as a teacher at the prestigious UA."
"An addition like me? Am I just an add-on for publicity, principal Nedzu?"
"Take it as an inspiration icon, All For One. For both villains and young minds who might want to choose the wrong path."
"How are you so sure I wouldn't try anything once I get out of these restraints?"
"That's why we brought Eraserhead with us. His quirk comes in handy here." Nedzu made a little pause, glancing at Shouta and Hizashi before looking back at All For One. "And Present Mic is here for emotional support. You've been terrorizing his students for a while."
"If I accept the deal, I get freedom and a better health condition yet I lose the thing that represents me and I'm stuck teaching at a school with all the people I hate?"
"Precisely."
All Might could almost hear that ominous music he always associated with the man before him. Aizawa looked close to strangling All For One and Yamada was holding onto the brunette's hand so he wouldn't do something stupid. Nedzu was staring straight into All For One's non-existent eyes, completely unbothered to read the room.
"You're not one to back off, are you, Nedzu?"
"Not at all, All For One. And I'm still waiting for your response." Nedzu leaned back, one leg over the other while crossing his arms.
All Might took a step forward himself, allowing himself to interfere. "What is your answer?"
The room was quiet for a while. All For One seemed to weigh his options while Aizawa was boiling in a corner and Yamada tried to calm down the feral cat he called his husband.
"Are you sure about this...?" All Might muttered, asking Nedzu in a way so All For One couldn't hear.
"Very sure, Toshinori. My plans never fail."
"I really hope that's true."
"I'll bite. I accept." All For One's voice cut through the tense silence. "I am quite intrigued by the concept of working with children."
"Lay one finger on my students and I swear to God-" Shouta chimed in, he didn't quite get to finish his sentence since Hizashi was there to clamp a hand over his mouth.
"I see we have a deal. Very well."
Eventually, with the help of Shouta's erasure, Eri's quirk (only with her consent and Aizawa watching All For One's every move) and a bullet which deleted quirks, All For One was.. normal? Somehow? Kind of?
Thanks to Eri's quirk, he got back his eyes and hair. He looked like a man in his 50-60's. Still tall, still quite intimidating.
His quirk was gone. At least, for now. Those bullets might work differently on All For One, so it's best to be careful.
The next day at UA was pretty awkward. Aizawa entered the class, followed by All Might and All For One.
The class went quiet. So quiet you could hear a pin drop.
Poor Midoriya looked like he was ready to explode on the spot.
"Nedzu.. thought it'd be a good idea..." All Might could practically read their minds, read all the questions on their faces. "He'll.. assist Aizawa-san's classes..."
"I can talk for myself, All Mighty, thank you nonetheless."
"Thank you, All Might. You can leave now."
All Might nodded, practically scrambling through the door while Aizawa turned his gaze to the black board.
All For One took a seat in the front of the class to the side. Every single kid in that class, maybe except Katsuki, was pretty much trembling or frozen with fear, and Aizawa didn't like it one bit.
"We took care of him." Aizawa spoke up, not bothering to glance at anyone in particular. "His quirk is.. pretty much under control so far. He will not be a threat. And if he tries something—" cutting himself off, he shot All For One a murderous look, his quirk activating on instinct " —we'll be sending him back to Taratus."
All For One didn't look the least bothered, he crossed his legs one over the other as he leaned back in his seat while Aizawa was glaring daggers at him.
The lesson continued. Everything was.. quite normal. Quite.
The kids were writing down with stiff movements, Shouta activating his quirk at every small movement All For One made.
Who would've thought the literal demon lord would be assisting Shouta Aizawa's class at 8 in the morning on a Wednesday?
The bell didn't even begin to ring properly, Midoriya practically bolted through the door, searching through the whole building until he found All Might.
The kid was hyperventilating at this point, Toshinori felt bad.
"Deep breaths, Young Midoriya... Let me explain it to you once you calm down."
"Calm down? CALM down? All Might, All For One is SITTING DOWN IN OUR CLASSROOM, I AM AS APPROPRIATELY CALM AS IT IS!!"
"It.. is pretty bad, isn't it...? Look.. it was Nedzu's way of.. promoting the school. All For One, taken in rehab by UA and "changing his views on life"..." All Might rubbed the back of his neck, trying to act as normal as possible, he didn't want to alarm the kid. "It'll be okay.. his quirk doesn't work. We made sure of that. And Aizawa-san is keeping an eye on him."
"I can't help but worry.. it feels like the bounty over my head got way bigger." Midoriya was pacing left and right, mumbling to himself twice as much as usual. It would've been funny if there wasn't a literal god of destruction roaming around the building.
Midoriya's head was filled with what ifs, with all possibilities and bad outcomes that could result from this stunt principal Nedzu pulled.
His train of thoughts was interrupted shortly after, Aizawa calling out for Toshinori. "All Might. Council meeting. Stop hovering around that son of yours."
"HE'S NOT MY SON!" Toshinori choked out, scrambling to get to the lounge.
All For One was following behind Aizawa, looking as relaxed as ever.
Sleep wasn't treating Izuku that well tonight. And by the time he finally fell asleep, he couldn't even rest properly.
He found himself in the One For All domain with the past users. And God, was there chaos.
Poor Nana was pacing back and forth, Yoichi was trying to not make Kudo throw a fit and Banjo looked like he was about to pull his hair out if he had any left.
It was different this time now. Izuku could move, could talk.
"Ah look, now the ninth user is here! Fucking great." Kudo threw his arms in the air, starting to pace around also. "I swear to the lords above I'll make rat soup out of that animal—"
"Keep it down, Kudo." Bruce snapped. Yeah, none of them were in such good of a mental state right now.
Izuku looked over to Nana, who was now excessively mumbling things to herself. That reminded him of someone... He couldn't quite put his finger on it tho.
Yoichi eventually noticed Izuku standing there very confused and clueless. Gee, poor kid.
"Don't mind them.. they're... A little stressed."
"STRESSED?!? I'LL SHOW YOU STRESSED—" Kudo snapped once more before Yoichi slapped the back of his head.
"Stressed and traumatized."
"How.. what is going on...? " Kid looked like a deer in headlights. "This is new.. what the hell..."
"You see.. since my brother is quite literally three steps away from you... The holders are getting paranoid. Especially Shimura, Bruce and Banjo."
"Are you.. not paranoid also...?"
"Meh. Could've been worse."
"WORSE—?" Kudo found his voice yet again, which earned him another slap behind the head.
"He's quirkless, Midoriya. For now, at least." Yoichi was too calm. Way calmer than he should've been. "He's being watched over. You don't have to worry about him."
"Are you out of your mind?" En asked as he practically appeared out of nowhere. "You cannot tell us not to worry about him after he KILLED us, Shigaraki."
As the One For All users were arguing, Izuku took a few steps back and glanced at Nana once again. The woman was slowly going insane. Jesus, he needed to get out of this place.
A few hours prior, the council meeting started. Today's subject? Where the fuck will All For One stay?
"He should live with Eraser." (Midnight)
"He should what now?" (Aizawa)
"Why do we need to figure it out?" (Yamada)
"Because of Nedzu's poor fucking choices." (Aizawa)
Nedzu eventually arrived, taking a comfortable seat in Aizawa's scarf as usual.
"What's good, teachers? What ideas have we got?"
"I still think he should live with Eraser."
" Midnight, I swear to God—"
"OH C'MON, EVERYBODY WILL BE SAFER THAT WAY!!"
"Can't we just.. let him stay in the teachers' dorms...? I feel like it'd be pretty safe."
Everybody turned to face Toshinori, looking like they weren't used to him saying something smart. The dorms weren't a bad idea. Lots of pro heroes to look over him including Aizawa.
"Dorms it is!" Nedzu chirped, jumping out of Aizawa's scarf. "I should warn him beforehand. Staying in a dorm next to Eraser isn't so pleasant when he's married to a hero whose main attack is his voice."