The sounds of sirens and speeding vehicles could be heard on a bright Monday afternoon. A squadron of firetrucks, ambulances, and police cars was called to respond to a fire located on 44161 Sakura street in Musutafu, mainland Japan. The hero Backdraft and the lead detective of Japan's police agency, Detective Tsukauchi, were also called out to aid in the call.

"What's the report so far?" Tsukauchi asked the officer beside him, who let out a hollow sigh.

"According to Backdraft and the first responders, the fire started at 3:30 pm, just after schools were let out. According to some passerby, the fire just… started. There was no starting smoke, just instant flames. Many believe it to be a fire quirk user activating their Quirk in a flammable environment." The officer said as they parked the car just outside of the burning building.

The detective sighed, getting out of the car as the raging fires started to die down due to the constant stream of water. "Is it safe to look for survivors yet?" Tsukauchi asked as he grabbed the rim of his light brown fedora, his light brown trench coat blowing in the wind, revealing his black jeans and shoes as one of the firefighters shook their head.

"No, they're still putting out the inside. Once that's cleared, you can enter the building and look for survivors. I wouldn't count my bets, though. The inside was far worse than the outside, so the chances of there being any survivors are slim to none." The firefighter said as Tsukauchi let an annoyed sigh escape his lips.

"Of course…" The detective muttered, his mind going a mile a minute trying to connect the dots in his head. This residence belonged to the Midoriya family. He knew of Inko Midoriya, as she worked at a local charity he would frequent, and that her husband, Hisashi Midoriya, had a fire-breathing Quirk. It would've been a slam dunk case had it not been for the fact that Hisashi had been living in the USA for over 11 years and hadn't set foot in Japan since.

Their son, Izuku Midoriya, would've been the next best candidate had he not been born Quirkless. "Trying to piece it all together, I see?" Detective Tsukauchi blinked a couple of times before looking over to his right. A cat-like humanoid stood beside him as Tsukauchi sighed.

"Ah, Deputy Tamakawa, good to see you here. You'd be correct in saying that, yes. I've deduced that the fire being an attack within the family can't be possible. The father, who has a fire-breathing Quirk, hasn't been in Japan for years, and their son, Izuku Midoriya, is Quirkless." Detective Tsukauchi said as the Deputy hummed.

"While that is true, what if it wasn't Quirk related?" The Deputy countered as Tsukauchi hummed questioningly.

"I didn't quite think of that, Deputy. Thank you for the idea. I-" Tsukauchi was about to continue his train of thought when he heard shouting.

"IT'S SAFE TO LOOK FOR SURVIVORS NOW!" One of the firefighters said as Tsukauchi rolled his shoulders.

"That's my call, Deputy. Do you want to come with me?" The lead detective asked as the Deputy shook his head.

"As much as it would be worth my while, I need to stay at my post." Deputy Tamakawa said as Tsukauchi nodded. Putting his right hand in his right pocket, he grabbed a flashlight before he began walking up the stairs leading to the top floor. After the slightly exhausting climb of eleven fleets of stairs, Tsukauchi walked over to the burned-out apartment, and as soon as he came just a few inches close to the door, he could smell the aroma of death reeking from the inside.

He resisted the urge to puke, putting on a mask over his mouth and nostrils that he had in his breast pocket of his trench coat. Walking into the small apartment, he shone his flashlight around the entrance, finding nothing. However, as he took another step, he felt an unevenness on the floor. Lifting his foot up, he saw the remains of a charred hand.

"What the fu-" Tsukauchi said as he stumbled backwards, tripping over a loose floorboard and into a barely sustainable wall. The wall fell through, with him collapsing onto the floor because of it. "Ugh, well, that doesn't happen every day," Tsukauchi said as he stood up, brushing ash and soot off of his pants and trench coat. "Just every other day…" the detective grimly joked as he shone his flashlight at the hand.

It was now a bit crumbled, as he had just stepped on it, but it was connected to a young-looking boy. His face was burned beyond recognition, and his hair had been all burned away, not to mention, the eyes had been seemingly dug out by something, or someone, as there were melted orbs on the floor beside the head. There was also a hole in the center of his stomach.

The detective, again, resisted the urge to puke before moving forward. Grabbing a walkie-talkie be pressed the talk button and radioed the Deputy. "Deputy, I found the body of who can only be assumed to be Izuku Midoriya…" Tsukauchi said as he shone his flashlight around the living room/dining room of the apartment.

"Any signs of Inko Midoriya yet?" The Deputy asked as Tsukauchi didn't respond. He continued shining the beam around the house until finally, it landed on the body of an overweight woman, hair barely on the body with numerous stab wounds all over the charred corpse.

"Yeah, just found her corpse," Tsukauchi said, resigning his emotions from cropping up. He could only imagine what the woman's last thoughts were before her death. Tsukauchi was pissed off, but he wouldn't let his anger get to him right now. Picking up his walkie-talkie, he pressed the talk button, and with an air of finality, he spoke into it.

"Call for sniffer dogs, and have 4 to 5 officers sweep the place completely. This isn't an accidental fire. This is indeed an arson homicide." Tsukauchi stated, putting the walkie-talkie back in his pocket as he grimaced. "Whoever did this planned it out beforehand, so I can't even call it a spur of the moment thing… this was calculated. We might have a serial killer on the loose if we don't catch this person…" Tsukauchi said, turning back to walk out of the apartment.

Tsukauchi had come across cases like this before, but unlike those other times, this was personal. He knew Inko Midoriya, and he knew their son. He was a sweet kid, but to see them both brutally murdered like this was something out of the question. It was beyond immoral. They had no enemies from what it seemed, and nobody had it out for them.

As he exited the apartment, he turned to one of the officers standing outside. "Tape off this building. Only people with special clearance, such as other police officers and B-rank heroes or above, can only enter this building. Do I make myself clear? Unless it is people with those qualifications, do not let them come near or enter the crime scene." Tsukauchi stated as the officer gave him an off-handed salute of acknowledgement.

Walking off the premises, Tsukauchi got into the car and drove back to his office. He had many things to think about, but the main one was: who killed the Midoriya's and set the building on fire?

However, unbeknownst to the police officers, just a few blocks down the street, someone was watching the chaos. His face was covered in shadows as a crooked smile was etched on his face. "I see… someone had burnt down that place over there. Hmm, when I heard that the Midoriya's house was burnt down, I felt a tad bit sympathetic. After all, they were in contact with All Might, which could've been useful." The man said, his suave and charismatic voice sounded just a hint more menacing due to his title and occupation.

The man in question was a tall, well-built man wearing a black tuxedo, fixed with a black tie. He carried himself like a king, and he had every right to do so. He was the most powerful man on this planet. His name was All For One.

In his mind, he believed that fate had chosen him to be the equalizer of the world, that he had been chosen to rule it with an iron glove. This was because of his Quirk, All For One. Yes, it was confusing. His name was All For One, and his Quirk had the same name. It wasn't a case of, 'name your Quirk after yourself.' Rather, it was a case of 'name yourself after your Quirk.'

All For One's birth name was that of Zenchi Shigaraki, and his Quirk was only named when he was 25 years old and when he became a mega maniacal dictator of Japan. His reign was only cut short at the 15-year mark when a resistance forced him to retreat. His brother spearheaded this movement, who lost his life during their fight.

His brother had the oppositely named Quirk: One For All. A Quirk he wanted, as it was a part of All For One that he had stupidly given to the younger brother, who had passed it on to someone else, who started a trend to pass the Quirk down to others upon their defeat/near defeat. It was something that he hated, and while with most other Quirks that he could just rip from someone, One For All had a built-in safety feature that required the person to give it up willingly if it was to be passed on.

That was the only thing stopping him from forcefully stealing the Quirk out of the hands of the current holder; All Might.

"Hmph, well…" All For One muttered, looking down to his feet. Laying amongst a pile of trash was a person covered in a cloak. "I feel slight pity for the homeless. However, for someone who is homeless, that means the Quirk is either useless or too dangerous to be used. Either way, I shall claim your Quirk for my own." All For One said as he picked the body up by the neck, lightly holding onto it as not to wake the person up, who he assumed to be sleeping.

"Fret not, for it was fate that brought us together, and it was fate that your Quirk would go to a more righteous cause." All For One said as he began the Quirk stealing process. Red mist encircled his hands as he could feel the string in his hand. All he had to do was yank it out-

-His hand was empty, and the man had mysteriously disappeared. All For One recoiled from confusion as he looked around in front of him. Thousands of thoughts were racing through his head, perhaps a teleportation Quirk? But if that was the case… he looked up at the sun. While using a telescope quirk, mixed with an analysis quirk, he determined that the sun had moved ten micrometres since the last action he took, meaning… 10 seconds had gone by. He hadn't even noticed anything. It was like those then seconds were skipped over.

A small bead of sweat dripped down the side of his face as he felt a sense of dread sink in. "Fate, you say?" A deep, almost bone-chilling voice said as he felt something sharp stab into his back. He wanted to turn around, but the spot in which the object had stabbed into was in a key position in the human body that prevented all movement, practically making the person paralyzed.

"You think fate favours you? A man who steals naturally born abilities and can distribute them to others? Yet you hoard them all to yourself? You are nothing more than a glorified hoarder. Fate hadn't sided with you. Rather, it had sided with me…" The menacing voice said as the object had now forced itself through his skin, muscle, spine, large and small intestines, and out through his gut. The object in question was a fist, a white, green gem-studded fist, attached to a red arm with white stripes going back and forth in a cross-like pattern. "…by giving me the ability to erase time and leap past whatever unfavourable fate I foresee." The figure said as the fist was ripped out of All For One's stomach.

Blood gushed out of the wound and his mouth as he activated several of his healing quirks. Unfortunately, they were not working fast enough. He sputtered, stumbling backwards as he hit the musty brick wall of the alleyway. The flesh, organs, muscle, and bone were slowly piecing themselves together; however, it was at such a slow pace that All For One feared that he might die at the rate that they were healing.

"D-Damn you! Do you even know who I am?!" All For One sputtered out as blood leaked from his wound as a foot slammed itself on his chest. The figure's leg was also of the same pattern as the arm. However, it wore a boot with a green orb on the footwear's tongue, unlike the arm. On its knee was a diamond-shaped knee pad.

"Of course, All For One, how could I not know you? You're the infamous crime-lord of Japan, one who is out of touch and one that is long due for a replacement. Such as myself." The figure said as blistering green eyes stared down at him, concentrated rage hidden within the mystical orbs as they narrowed on All For One's disfigured face. "You're a relic of the past, one that must be erased for the criminal underground to progress and flourish." This figure said as All For One could barely make up the shape of another figure covered completely in shadow, a red aura surrounding them.

"F-Fool! My League of villains will a-avenge me o-once they find out who were to be as stupid enough to fight me! They'll kill you!" All For One sputtered out as he reached his hand out to activate air canon, only for the arm of the figure to swiftly chop down and cut the arm off of his body. All For One had never taken this kind of damage before. He'd be beaten senseless. He'd been sent through buildings, but never had he been mutilated to this degree.

All For One let out a guttural scream of pain as he lifted his head in the direction of the figure. "There was one thing you were correct about when you mentioned fate. It was that this encounter was fated to happen. But fate favoured in my hands, not yours. Now, begone." The figure said as a fist from the figure made contact with the villain king's head. The swing and punch's speed and force destroyed his face, similar to that of a mallet smashing into a watermelon. Blood, bone fragments, flesh, and muscle painted the walls and floor in a disgusting shade of crimson.

"Now, for a hostile takeover of the League of villains. That won't be too hard, as all they have is that doctor." The figure said as the red aura that surrounded the shadowy individual disappeared. The secondary figure disappeared as the shadowy individual chuckled darkly.

"My reign will begin here in Japan. Nothing and no one will stand in my way, and if they do, they will all die horrific and brutal deaths." The mysterious man said as he walked out the hallway, leaving the corpse of the evilest man on the planet to rot.

To Be Continued

Hello everyone, DeathlyJazzHands55 here. So, I saw this idea floating around about an Izuku!Diavolo fanfiction and I love the idea. Firstly, however, I want to say that the story known as Deku: The Crimson king by Staincain17 was my inspiration for this story. In fact, it was the sole reason I decided to write this idea.

Diavolo has always been one of my favourite villains from JoJo's Bizarre Adventure, only behind the likes of Funny Valentine and Tooru from the steel ball run universe. Of course, I know the beginning of the chapter made it seem like Izuku was dead, but no, he isn't. Obviously, with the claim I have said in this author's note, all will be explained in the coming chapters about who the boy's corpse was, and no, it wasn't Bakugo.

For now, I will both be posting this on the crossover section of Fanfiction and the non-crossover section. Why? Because why not.

Anyway's, that is all for now. Have a good day.