Kyudai Garaki pov'

I don't believe it. He almost killed him.'The doctor heard about the incident from Kurogiri and was baffled. A student using their quirk out in the open. It's not surprising for someone like Shigaraki to use his abilities, but a student from UA almost ruined years' worth of plans in a few minutes.

"Tell me doctor..."

A voice spoke to him, belonging to a man with a disfigured face who is currently seeing footage of the incident that happened at the mall.

"Who was it? Who was the person who left scars on his neck? Who almost killed a clearly sick boy?"

"The tattooed student Ryoumen Sukuna, sir."

"And what about his quirk?"

"From the information gathered, we've only discovered quirk nullification, invisible slashes, and a shrine summoning attack. Plus a regenerating quirk."

"What! Is he a highly powerful Nomu that I didn't even know about, doctor?"

"N-no sir! he's a regular born human with a very unique quirk. And even then, not a single Nomu looks human or somewhat possessing human features."

"Interesting. Add another target to the list of priorities."

"UA is starting a little camping trip.The League needs to capture the targets. Use Kurogiri to catch them.After that, bring Ryoumen Sukuna to me. I'll take his quirk from his corpse if I have to."

"As you wish master." and with that, the doctor left.

All for One pov

'It seems One for All has a challenger.'

Afo smirks

'Oh Ryoumen Sukuna. You have gained my attention. You almost killed Shigaraki, he now has conviction and people who approve of his convictions. If he asks for help, I will save him. But you, you started something that will never be undone. Your quirk and One for All will be mine.'

...

Sukuna Pov

Early in the morning and with nothing better to do, Sukuna walked around the neighbourhood, trying to gather some negative energy to replenish his cursed energy.

'Man. This is boring.'

As he was walking, he noticed a beach right beside him and decided to have some fun.'Hmm, it wasn't this clean when I last saw it. I guess someone cleaned it up.With his shoes of Sukuna leapt as far as he could into the sea. Immersed up to neck. He swam farther from the shore. Kicking through the currents. After a few minutes, he decided that it was far enough. With a grinned on his face, he brought his hands together and said.

"Domain Expansion: Malevolent Shrine"

The water suddenly became dark, and a demonic shrine emerged from the depths itself immediately, destroying the sea around it and some of the ground below, creating a crater at the bottom of it as if the Shrine came down like a meteor.

The sheer destructive force from Malevolent Shrine drains its depths so swiftly that nature struggles to replenish the void. And creating some sort of air bubble around it, as if the sea itself refuses to touch the Shrine.

Sukuna was standing on the shrine, smiling from uptop marvelling at the destruction caused by it.

'If someone's on the beach. Then I hope they took a few pictures of me.'

While he was enjoying himself. Two figures from the beach looked in bewilderment.

Midoriya Pov

Midoriya just finished his training and was about to grab the water bottle that's being given by All Might. They then noticed that the water turned black and a shrine emerging from the dark water.All Might noticed this and transformed into his muscle form, not giving a damn if other people saw him.

"A villain attack? wait...what's that?"

He pointed at the demonic shrine in the distance. And with a closer look, they saw Sukuna on top of the shrine.

"That-that-that's Ryoumen-san!" Midoriya screamed. 'That's his Shrine! What is he even doing all the way there.' Before any of them could call out to him, the shrine disappeared. With sukuna falling into the sea, with it crashing into him from all sides.

All Might immediately leapt into the water to save him.

...

On the beach

After saving him, he was dried off with a towel given to him by them. Then, he answered a few questions from them. Why was he out there? why was he using his quirk? and so on and so forth. After every question was answered, every injury that he sustained has healed. Sukuna wanted to get to the bottom of everything.

"Now that both of you are done. It's my turn to ask my questions. Why are you guys here?"

All Might patted Midoriyas shoulder.

"I was training young Midoriya here to master his quirk."

Sukuna sighed. He knew both of them weren't telling the entire truth. He decided that their little lying game is over.

"That's it." Sukuna stood up and closed his eyes. "All Might is getting weaker the more he uses his power. He is trying to train Deku because his quirk is the same, kinda like passing on the torch." He hoped that he got some of it right. "A villain managed to injure All Might so heavily that he destroyed most of your respitory organs. Targeting the organs diminishes your strength even faster. You thought I didn't notice your strength lowering when you struggled lifting those couple of pounds of weights. Also, It was weird that your quirk charging up is the same as All Might. Either the quirk can be passed on to another person, or Deku just has a very powerful copying quirk."

He gasped for air. "Did I get all that correctly?" and opened his to see Midoriya and All Might as pale as ghost, as if they saw something unbelievable. or, in this case, heard something unbelievable.

'He...he...figured it all out.'

All Might snapping out of the trance."All right, young Sukuna deserves the truth." He turned into his skinny form.

"So that's what you look like."

And told Sukuna everything that he told Midoriya.

...

Toshinori Pov

'I can't believe it. He managed to figure out most, if not everything.'

Sukuna was lost in thought from the information dump.

"So what about this."

Sukuna coated his hand with cursed energy.

"If I heal your damaged organs. Will your strength from your prime return."

'I wish that was possible.'

"No, after giving my quirk to Midoriya, only remnants of my power are remained."

Sukuna immediately put his hands down which surprises Midoriya.

"Ryoumen-san? why did you-?" "Because I want to fight prime All Might. And if healing his wounds can't even restore him back to his prime, then he doesn't need it."

"He still is the number one hero-" "Hah! really! you still fucking worship him like he's a god. He's just hero who's slowly loosing his title!"

"It doesn't matter if his strength is lowering. He still tries to save people with a smile on his face! Even when he could die fighting this powerful villain, atleast he died protecting people!"

"It's useless protecting people if they're gonna die by the villains' genius! You're just delaying their doom."

"Please, both of you stop fighting." All Might plead fell on deaf ears.

"Then delay All Mights doom. You can heal his organs and stop him from coughing out blood."

"Did you not hear what I just said. If he's still not back his prime I won't heal him."

"Then.." Midoriya bit his finger causing it to bleed and turned to All Might. "Young Midoriya, what are you doing?"

.

.

.

.

.

"All Might, I'm giving back your quirk."

This declaration shocked both All Might and Sukuna.

"WHAT!" they both said in unison.

"One for All can be transferred back to other people, right? then I'm transferring it back to its owner."

"N-NO absolutely not."

After hearing that. Sukuna called All Might a coward for refusing it.

"Just no." "Why not?" Midoriya questioned

"I-its impossible."

"Why not you stupid bastard."

"BECAUSE IT DIDN'T WORK BEFORE." All Might screamed silencing both of them.

"It wouldn't work now." he whispered.

Midoriya hesitantly asked him how did he knew that.

All Might sighed "The wielder of One for All before me was Nana Shimura. I was her protégé like you Midoriya. Back then, I had so many questions about OfA. And asked if I could test my theory out. After the transfer from me to her, her strength somewhat started to return. But in just a few days her strength started decreasing again. Thankfully, the quirk was transferred back to me."

"So that's why your strength is decreasing. It's because once you receive OfA you must never loss it or you'll get weaker no matter what."

"Actually no. That wasn't the case."

"What?" Midoriya didn't understand

"Oh bullshit." Sukuna didn't believe it

"Weirdly enough, my strength decreases when I received the heavy blow to my stomach."

"So it lagged. And the blow regrettably fixed it."

"Something like that, That's why even if I do receive it back. it will only weaken me and possibly even young Midoriya's strength. "

After listening to everything that he has to say. Sukuna decided to heal All Mights injuries.

"Are-are you sure?"

"Keep talking and I won't heal it."

All Might and Midoriya even kept their mouth shut when the healing was in progress.

After its done, All Might feels...different.

'Whoah, Not even recovery girl's healing is this powerful. I think I can even use my strength for a much longer periods amount of time.'

"There, that should-*humph*" Sukuna was cut of by Midoriya and All Might hugging him almost suffocating him with them thanking him over and over and over again.

"What you did. I can't thank you enough Young Sukuna."

"(muffled)Yeah-yeah now, can you please let me go."

"Thank you, Ryoumen-San."

"Just call me Sukuna."

"Hai! Sukuna-San!" Midoriya bowed.

After that, All three of them left awaiting their next adventure.(next chapter)

...

A/N Hello-hello everyone. I just wanted to thank you all for your patience. Now I just wanna quickly address something before

i stop .

OfA transferring back to its original owner is my idea that I came up with, I really hope it's not somehow canon in the mha universe (I genuinely didn't read the manga)

And owner receiving what used to be their quirk (OfA) gets weaker is (I hope) not canon in the story...I really hope .