Two months had passed since Junsei delivered Eri to U.A.
During that time, his life had settled into a strange and unsettling routine. Every day he entered the underground laboratory, stood beside the metal tables, and gave Overhaul the blood and flesh he needed from his body.
From the outside, nothing about him seemed to change. But inside, he was growing restless. The emptiness within him was nearly full.
For two months he had made no real progress. It frustrated him.
Junsei had considered leaving Overhaul several times during those weeks. The thought of leaving the Yakuza for some time and filling the emptiness appeared again and again in his mind.
Finish what remained.
But each time he reached the same conclusion.
He needed Overhaul to finish his work.
The man's research was the key to eliminating quirks across the world. Postponing that work for personal impatience would be foolish and very human.
So Junsei stayed. For the sake of life.
And now, two months later, Junsei stepped into the laboratory once again with the intention of providing another limb for Overhaul's experiments.
The moment Overhaul noticed him, he spoke.
"You are punctual as always."
Overhaul adjusted a vial on the table before looking directly at Junsei.
"I have been curious about something," he continued. "Do you not feel pain? You keep ripping off your arm over and over again."
Junsei answered simply. "It hurts a lot. But if quirks disappear because of it, I can endure the pain."
Overhaul gave a small nod. "You have my respect, not many can carry on for their ideals like you."
Then he said something unexpected.
"I have good news."
Overhaul's eyes glimmered faintly.
"I succeeded."
A short silence filled the laboratory.
"I have finally found a solution to our quirk problem."
Junsei's eyes widened slightly.
"Are you certain?" he asked. "When can we begin?"
Overhaul chuckled quietly. "I see you are eager. That is good. We will need that eagerness."
He turned toward a series of containers arranged across the workbench.
"To spare you the technical details, I have discovered a way to convert the quirk-erasing compound derived from your blood into a gas."
Junsei listened carefully.
"In theory," Overhaul continued, "anyone who inhales the gas will lose their quirk. We simply need to produce it in massive quantities."
Junsei did not hesitate. "How much do you need?"
Overhaul answered "If you provide five hundred liters of your blood, I can create enough gas to cover the entirety of Japan."
Junsei nodded once.
"I can do that."
Overhaul tapped the edge of the table thoughtfully.
"The real challenge is distribution," he said. "I could use some of my contacts and criminal organizations to release the gas across Japan."
He paused.
"But that only solves part of the problem."
Junsei frowned slightly.
Overhaul continued.
"The rest of the world still exists. Japan alone will not be enough."
Junsei nodded. Japan was only a small portion of humanity.
Overhaul spread his hands slightly.
"I do not yet know how we will expand beyond Japan," he admitted. "But if we succeed here, we will prove that quirks can be eliminated."
His voice grew confident.
"And once the world sees that proof, I am certain we will find others who share our vision."
Junsei considered that.
It made sense.
Overhaul continued.
"We must succeed in Japan first. After that, the world will come to us."
Junsei nodded again.
"What do you require from me?"
Overhaul pointed toward a large metal tank connected to multiple tubes.
"Fill that container with your blood," he said. "That amount should be enough for Japan. I will require roughly one week to process that volume."
Junsei asked, "And after that?"
Overhaul replied "Leave the rest to me. The only situation where I may need your assistance is if heroes somehow discover what we are doing."
Junsei nodded.
Then he walked toward the tank.
——————
Later that same day, Junsei stood alone outside the hideout. For the first time in months, excitement stirred within him.
He was close. Just one more week before the world began to change. Before life could finally be freed.
Yet the emptiness inside him remained. Junsei closed his eyes.
He could feel it.
The final step was near. He only needed a little more.
He had one week to wait while Overhaul processed the blood. The hideout was secure, and no immediate threat surrounded the Yakuza and he could always rush back to their aid if needed..
There was time. Time to finish the last task.
After thinking for a while, Junsei made his decision.
He returned to the laboratory and informed Overhaul he would be leaving for a day or two.
Overhaul barely reacted.
"That is fine," he said. "You have done your fair share."
Junsei nodded.
Then he left with a clear destination in mind.
A place where many of the worst humans gathered.
Humans who had taken too much life.
——————
Tartarus stood alone in the sea.
The massive high-security prison was built on a remote island nearly five kilometers from the mainland, surrounded by towering concrete walls and defensive fortifications designed to contain the worst criminals in the world. No ordinary prison could hold them.
Only Tartarus.
Even in the middle of the night, the facility never slept. Floodlights scanned the surrounding waters, surveillance drones circled the island, and guards patrolled every section of the perimeter.
The criminals inside were too dangerous for anything less.
That night began like every other.
Until one of the guards stationed near the bronze gate noticed movement on the bridge leading toward the island.
A lone figure was walking calmly through the darkness.
Immediately, flashlights snapped on. Powerful beams of white light cut through the night, illuminating the bridge as several guards raised their weapons.
"Who goes there?!" one of them shouted.
The lights revealed a tall figure with long white hair approaching them slowly.
Then his eyes began to glow.
Blue.
The next moment he moved.
Junsei launched forward with explosive speed, crossing the bridge in an instant. The guards barely had time to react before the first screams rang out across the entrance.
"INTRUDER!"
Alarms erupted across the island.
Sirens howled.
Junsei reached the gate.
One punch.
The massive bronze barrier tore open like thin metal, ripped from its hinges and thrown aside as if it weighed nothing. Instantly the entire prison mobilized. Guards rushed to defensive positions, combat units deployed from secured hangars, and automated robots activated across the facility.
Above the walls, heavy turrets rotated into place.
Cannons locked onto their target.
Junsei.
He raised his hands.
They began to glow.
Explosions erupted in every direction as he fired wave after wave of destructive blasts. Turrets shattered. Guard towers collapsed. The defensive lines crumbled under the assault.
Within minutes the island descended into chaos and slaughter.
——————
Deep within Tartarus, far below the surface, the prisoners heard the alarms.
Metal doors slammed shut throughout the facility as automated security protocols activated. Guards rushed through the corridors carrying weapons while armored doors sealed off sections of the prison.
Inside their cells, inmates were confused, alarmed and curious. All at the same time.
None of them had ever seen the prison react like this before.
Something big was happening outside.
The alarms continued for nearly half an hour.
Then the explosions began.
This time they echoed through the lower isolation levels themselves.
Some inmates laughed excitedly, convinced that someone had come to break them out. Others remained silent, listening carefully to the sound of guards' screams and running as the distant sounds of battle grew louder.
Not everyone believed this was good news.
Among the more cautious prisoners sat Lady Nagant.
She sat quietly inside her cell, listening. Her instincts told her something was wrong.
If Tartarus was being attacked, it meant something truly dangerous had happened outside.
Then the screams reached her level.
Real screams.
Voices of inmates she recognized.
Lady Nagant stood slowly, her eyes narrowing as unease spread through her chest.
The sound came closer.
Then suddenly… BOOM.
The reinforced door to her cell exploded inward.
Smoke drifted through the opening.
And a figure stepped inside.
White hair.
Glowing blue eyes.
The presence alone sent a chill down her spine.
Danger.
Pure danger.
The man looked directly at her and said with a little surprise "Lady Nagant?"
Nagant frowned slightly, studying him.
"Who are you?" she asked calmly. "I don't think I know you."
The man did not answer.
Instead he raised his hand and pointed a finger toward her.
A small flash of red appeared.
Then it was over.
The blood bullet pierced her head before she could move.
Lady Nagant collapsed instantly, never learning the name of the person who had come for her or the reason for her death.
Junsei lowered his hand.
He had seen her before in the memories of All For One.
It was from Lady Nagant that Junsei was inspired to fire bullets formed from his blood.
He turned away from the corpse without another glance.
There were still many humans inside Tartarus.
And Junsei had come here to kill them all.
——————
The next day, Japan woke to another shocking piece of news after months of silence.
Junsei.
The villain whose name had already become synonymous with fear and death had singlehandedly attacked Tartarus, the nation's highest-security prison, and destroyed it completely. Dozens of guards were killed or wounded trying to stop him.
As for the hundreds of prisoners held within its walls…
Not a single one survived the slaughter.