One-way traffic

A One-Way Passage by Death_heat

Academy City.

A magical city with a population of 2.3 million, filled with countless people possessing extraordinary abilities.

Standing atop that peak is the true monster.

First, one side passes.

The pinnacle existence possessing the strongest and most malevolent power to truly control the direction of all energy; the strongest monster in Academy City, reigning supreme over all.

He will face encounters with countless worlds that transcend time and dimensions.

This is a world where countless whimsical ideas converge, a world of magic, a world of technology, and all sorts of people and things mingle together.

Then, the first person will experience all of this firsthand.

"—Interesting. Then let me see how your so-called justice actually works, my heroes?"

Having demoted himself to the villain, Accelerator, the most vicious and evil anti-hero, what kind of encounters will he have on this journey that transcends dimensions?

The strongest and most evil one-sided dark hero awakens here.

This is a crossover fanfiction featuring various anime and manga series, with Accelerator as the main character, aiming to recreate the feel of the original A Certain Magical Index.

Academy City

Prologue: The Strongest Superpowered Being (Level 5)

The room was dark.

Only with a few lights can one see the surroundings clearly, just like a place in a movie used to interrogate special criminals. This is such a gloomy area.

At first glance, it looks like a prison cell, but in reality, it's not a prison at all.

This is a shop.

It's not a convenience store for selling everyday goods; it's a place that specializes in selling things that can't be shown to the public.

Just a casual glance around reveals a bunch of unimaginable things on the surrounding walls.

Firearms, bulletproof vests, all sorts of sharp weapons used to injure people, as well as specially made weapons that can't be found anywhere else, and even medicines are available. In fact, if you have enough money, you can buy anything you want here.

Including human lives.

"guest."

A young man with short brown hair, who looked to be nineteen, stood in front of the counter, a cigarette between his fingers.

"You've been looking for five minutes now, don't you know what you really want?"

Without a doubt, he seems to be the owner of this shady place.

Despite looking only nineteen years old, like someone who has just graduated high school and should be in college, he was already engaged in this kind of work.

The young man had a very casual expression on his face.

"We can do anything for you, as long as you have the money."

"It's fine to clear your identity and repackage you as someone else, or we can let you secretly leave this city and live under an assumed name. Of course, if you want anything else, such as organs, medicine, or assassination soldiers for private transactions, that's also fine."

"As long as you have money, you can get anything done, but... your appearance makes things a bit difficult in some areas."

He touched his chin with his left hand and said subtly.

"After all, it's very difficult to transform someone with your appearance into someone else."

There was another person in the darkness.

A series of crisp footsteps sounded, and a figure emerged from the darkness, revealing his extremely eerie appearance.

Unlike normal humans, just one glance at them is enough to instill fear in people.

…This kid looks really scary.

The young man standing behind the counter narrowed his eyes, thinking to himself.

Let's finish this work as soon as possible and go home for a few puffs.

"So, have you decided what you want to buy?"

He subconsciously urged him again.

then.

"Is this all you have in your shop?"

"Huh? Well, how should I put it? Although there are still quite a few goods at headquarters, those are all my superiors' stuff. My side is just a small branch."

"I see."

Then, the young man heard a sound.

A metallic click-like sound.

"The so-called superior is actually referring to the personnel management, right?"

Eh?

The young man was stunned; it wasn't until this moment that he saw it clearly.

—The object that made the metallic sound in the other hand was a lightweight pistol.

That was a guy who was about the same age as me.

However, it's different; it's completely different from normal people.

—It had white hair, red eyes, and a gray-white striped shirt that looked like an arrow.

He was also leaning on a huge metal cane, like something out of a science fiction movie, in his right hand.

A bright green light shone on his neck like a cage imprisoning a monster.

"As expected, he's a lackey of that kind of worthless scoundrel."

The next instant, the person on the other side pulled the trigger.

Thud! He was instantly hit in the chest by a bullet and fell directly to the floor.

Ugh! A sharp pain shot through his chest, but thankfully, he didn't die because he was wearing a bulletproof vest.

"Damn it...! Is this guy here to arrest me?!"

The young man quickly pulled a black handgun from his pocket.

But before he could even get up, countless gunshots rang out.

In this way, he didn't even have a chance to get up, but...

"You underestimate me, you little punk."

The young man revealed a sinister smile, pushed aside a small bookshelf, and slipped directly into another room.

He pulled a grenade from his pants pocket.

"This thing's explosive power is no less than that of a C4 bomb. It's specially modified, so get ready to die."

He threw three grenades in quick succession into the room, then slammed the bookshelf next to him shut.

boom------! ! !

The violent explosion instantly shook the entire warehouse-like room. Fortunately, the entire warehouse had been specially fortified, so even if ten grenades had been thrown, they definitely wouldn't have been able to create a hole.

A colder smile crept onto the young man's face.

"Serves you right! Who told you to go looking for trouble! Did you really think that upholding justice in this city would be useful?"

But he failed to notice one thing.

That was the wall behind him, which cracked instantly.

Bang! !

Because of some unknown force, the wall behind him, which could withstand the impact of ten grenades with a power exceeding that of a C4 bomb, was shattered in an instant.

"Gah—!! What? How is this possible?!"

The young man hurriedly ran away, but he soon discovered it.

—From within the shadows emerged an even more terrifying figure.

The light shining on his neck was a scarlet glow, a symbol of death.

"I know that people who do this kind of work are usually a bit mentally unstable, but I never thought you would actually call this justice? Are you getting Alzheimer's prematurely?"

The crisp sound of a cane came from in front of him.

The person who came out of the room was unharmed.

How is that possible? How could a human possibly withstand an explosion of that magnitude? Even a superhuman shouldn't be able to withstand it so easily—

wrong.

It was only then that he fully realized something.

"Ah, ah ah..."

The young man trembled as if in despair.

White hair, pigeon-blood red eyes, holding a metal cane, and wearing electrodes around his neck like a monster's collar.

You can only find one person like that in this city.

He revealed the other person's identity.

"Academy City's strongest Level 5 esper, Accelerator..."

These were his last words.

In the next instant, blood, internal organs, and brain matter completely covered the entire warehouse.

——————————————————————————————————————

"Thanks a lot."

Under a clear sky, you can see some teenagers dressed like cosplayers on the streets.

But there was one person who was different.

He was just dressed casually in everyday clothes, walking down the street, yet he still exuded an aura of impending doom.

People around him initially thought he was cosplaying a cool character, and some even wanted to take a photo with him.

But almost no one came over to talk to him.

"In this way, the last piece under the management of talent dispatch has been completely eliminated. In the days to come, he should have a headache because he has no pieces. At that time, he will choose to come forward and sell the goods himself."

"And then we'll have to do the same disgusting thing again, just like today? How boring. The more you talk, the angrier I get."

"Don't say that. You're one of our most capable people, Accelerator."

He held the phone in one hand and leaned on the cane beside him for support with the other.

The strongest esper in Academy City simply stood to one side.

"Well then, this mission can be considered successfully completed. Please avoid familiar faces on your way back, to prevent any potential leaks of our organization's intelligence—"

The white-haired monster didn't want to give the other person a chance to continue speaking and casually hung up the phone.

"That bastard, what an unpleasant fellow."

The white-haired figure stood alone in the amusement park-like street, sighing to himself.

This is Academy City, a huge city with 2.3 million inhabitants. Although it was originally a region separated from Japan, it is essentially a huge country independent of Japan.

The main reason is that more than 80% of the total population in Academy City possesses abilities that were previously considered supernatural.

Ability users are the most famous beings that emerged from the development of Academy City.

After developing the brains of more than 80% of the students, they can acquire powerful superpowers like those in novels and movies. The abilities are rated into six levels, from the lowest level 0 to the most powerful level 5, and the level 6 realm that no one has ever been able to reach so far.

There are only seven people who belong to the Level 5 superpower level, but there is only one person who is at the very top.

Accelerator.