In MHA with JJK powers.

With bored eyes, Kurokai brushed his teeth using telekinesis.

The toothbrush, toothpaste, and even water moved on their own, forming a perfect cycle leaving the bystanders feeling dumbfounded.

"Kurokai kun you are being lazy!"

Lida couldn't help but say out loud feeling frustrated.

But Kurokai's response.

"I am not being lazy, it's a training to control my strength."

Left him speechless.

'No way....is he really training?', Lida's eyes turned serious.

It even made sense for some reason.

"You're working hard Kurokai kun...from the very first day...", Midoriya said in a small voice, his face becoming determined.

Todoroki looked at the scene, then stared back at his own toothbrush in deep contemplation.

Bakugo also glanced at him from the corners of his eye, then suddenly started brushing his teeth like a madman.

"Die Germs!"

----

After eating their breakfast at the cafeteria, students of class 1-A arrived in their class.

Not long after Teacher Aizawa entered and started the lecture.

"For now class 1-A of the hero course will be focusing on getting their provisional licenses.

"A hero license bears with it the great responsibility of human life."

"So of course the exam to receive one will be very difficult."

"It only has a 50% passing rate."

"No way!"

"But it's only a provisional license?!"

The students complained in small voices.

Meanwhile, Kurokai stared out of the window, feeling bored.

Eraser head ignored their voices and continued.

"By the end of today, we will have each of you come up with at least two ultimate moves."

As soon as he finished speaking, the door of their class slid open revealing Pro Heros: Cementos, Midnight, Ectoplasm, and All Might.

"Ahahahaha! Today will be an exciting day everyone!" 

The students were surprised.

"Ultimate moves? That's so cool!", Kirishima shouted.

"It's like a school activity but not at the same time!"

While everyone was excited, Hero Ectoplasm walked up to the front of the class and started explaining about ultimate moves.

Between his speech, Kurokai's gaze fell on All Might.

Through his cursed energy, he could clearly feel that most of OFA's embers were gone only leaving a very minute unusable about behind.

Still, All Might's body itself was strong enough especially after he helped him heal up.

Withdrawing his gaze from him, he looked at the next hero in interest.

Midnight.

Kurokai looked in curiosity, he wondered how she would take revenge on him this time.

As if sensing something, she suddenly stared back at him.

Their gazes collided in mid-air.

Just when he thought she would send him a silent threatening glare, something unexpected happened.

For some god-forsaken reason, hero Midnight actually blushed and moved her gaze away from him.

Kurokai was stunned.

'What the fck...'

This old hag.

Why was she suddenly acting like a little girl?

You actually dared to blush? At your age? In front of your student? Fck now I know why you're still single! You like them young!

Where's your shame? Where's your dignity? What about your self-respect? We're less than half your age!

Midnight!

You have finally shown your true colors!

Goddamn Child Predator!

Pedophile!

Kurokai cursed loudly in his mind, feeling a little excited.

After the general introduction, the students left the classroom under the teacher's guidance reaching a largely empty place.

"Every student will be trained in a place custom designed according to their quirk."

Hero Cementos touched the ground and started preparing the complex structure.

While Kurokai was looking at it in interest, he felt someone tap on his shoulder, turning around he saw All Might looking at him with a smile.

"What's up?"

"Kurokai-shounen....."

He siddenly brought his face close to Kurokai's ears.

The other students looked at them curiously.

"Can you use your cursed energy again?"

'Did he sense it? That my cursed energy acts as a fuel for OFA?'

Kurokai wasn't surprised, it was simple enough to guess if anyone put their mind to it.

Receiving a positive gesture from him, All Might smiled widely.

But then the image of Mechamaru passed through his mind making his smile falter for a moment.

'I originally thought I would retire after passing on One For All...'

He clenched his palm 

'But it seems I was given another chance to clean up my mess...'

A blinding light passed through his eyes.

'AFO, Shigaraki and Mechamaru.....'

'I All Might promise to bring you all to justice!'

Just then.

"Hey All Might."

Kurokai's voice made him stop.

"Ah Yes! What is it Kurokai-shounen?"

"That...your pants tore while you were flexing your muscles."

Kurokai explained pointing at his back, his hero pant was torn in the hip area.

"Huh?"

All Might couldn't react for a moment.

He couldn't understand.

His hero's dress was carefully made to withstand his power.

So how or rather why did it tear?

Beads of sweat started falling down All Might's forehead as he secretly touched his bottom.

Holy Shit! it was really torn!

"I see, I didn't know you were commando under your dress..."

He quickly distanced himself from All Might.

"Kurokai-shounen!"

Everyone was stunned by the sudden shout and hurriedly looked at the two of them.

All Might quickly hid his torn side to protect his dignity. 

"It's all right All Might, I understand It might be an adult thing..."

'That's not it!'

All Might shouted loudly in his mind.

He clearly remembers wearing his underwear this morning!

Then why was it gone---wait.

He carefully felt the fabric.

It was also torn?

It doesn't make sense!

No wait!

A bad premonition suddenly hit his mind.

'No no what am I thinking Kurokai Shounen wouldn't use his power for wrong----'

He suddenly stopped thinking.

The various times Aizawa came to his office to complain about Kurokai appeared in his mind.

All Might mechanically turned his head to look at him.

There he saw Kurokai with a phone in his hand, silently taking pictures.

When their gazes met, he stopped and quietly put the phone back in his pocket and acted like nothing happened.

'Kurokai shounen!'

While everyone was confused, Aizawa was also staring at the scene.

The more he looked at it.

The more he felt satisfied for some reason?

It was hard to describe.

Like he just met a comrade.

----

"It doesn't make sense.", Nighteye said in a confused voice.

"Just why did the entire yakuza vanish? Including Overhaul?"

He rubbed his forehead in confusion, through his sources he was able to confirm for sure, that the Yakuza including Overhaul was gone.

Wiped away in less than a day.

"League of Villains...Mechanical Overlord...."

Looking at the recent images of Mechamaru captured by street cameras made him let out a deep sigh.

"Since the yakuza are gone, I should shift my focus to finding Ua's spy."

Putting on his coat he exited the room leaving behind all his work and proof against the yakuza he had managed to gather over time.