Chapter Text
It all happened in a second.
“This is your fault! I hate you!” The villain screeched at All Might, and, almost as if on command, Nomu began to emerge. It was as if they were warped in from thin air- but the Warp Gate villain was still knocked out, right? What was going on-
Something began to bubble up in his throat, like bile. It burst from his mouth. A black, slimy goo.
“The hell-”
“Young Bakugo!”
All Might extended a hand out to him. He wanted to reach out - pride be damned - but the goo began to envelope him. Covering his mouth, nose, everything. His body was being compressed, squeezed. He was being warped somewhere.
Everything went dark.
In the darkness, he heard a voice. It took him a moment to realize it was his own voice.
“My nii-chan… is… the sweet...est… person… in the world…”
What? He didn’t have an older brother. He was the only child of Masaru and Mitsuki Bakugo. Why was he hearing his voice describe things that made no sense?
“Th...ank… you… nii...chan…”
The horrid, slimy feeling of the goo vanished, and Katsuki fell to his knees. He coughed and hacked, trying to rid his mouth of the sensation of the slime. It felt like his head was splitting open.
“Get a grip. Assess the situation-”
“What the hell? Where am I?”
A voice in his head identical to his own, but not his.
“What the fuck?”
“Where am I? And what’s that voice in my head?”
“Excuse you ? You’re in my head.”
“Apologies, Bakugo.”
Katsuki looked up at the scenario before him. This- this had to be the boss villain. The suit and tie, the ominous mask, the purely evil feeling in the air.
“Muzan.”
Suddenly, Katsuki felt like he was in the backseat of his own body, looking out through his eyes but unable to move his limbs. A mere passenger. He hated this feeling, the feeling of not being in control. His body staggered to its feet on its own accord.
The man seemed both mildly surprised and amused. “Hmm. You’ve got quite the odd aura around you. It almost feels as if a Nomu transformation is occurring. I wonder, how is that possible?”
“Nomu? The fuck?”
Katsuki felt a laugh rise out of his throat. It was a pitiful sound, an obvious mask for the fear both he and his body’s hijacker were feeling. “I don’t know what the hell you’re talking about, or why the hell you’ve got that stupid mask, but we’ve won! Your precious Upper Moons are all dead! The rest of the Pillars will be here soon, I’m sure!”
Katsuki growled, and flickered back into control. He hunched over and cradled his forehead in his arms.
“Get… out… of my… head!”
“Look, I don’t know who you are or what’s going on, but that guy’s dangerous!”
“Do you think I’m an idiot or something?!”
Katsuki heard a noise behind him. More of those gooey portals opened up, and the members of the League of Villains from the bar appeared.
“A teleporting Blood Demon Art? Are they demons? They feel like humans. Can I hold off both them and Muzan- wait, where the fuck is my gun?”
“You have a gun?”
“I should.”
Katsuki eyed the area as the villain went on monologuing to Shigaraki about something. That was not something he could trouble himself with at the moment.
“Alright, listen here, you hijacker. Why the fuck are you in my body?”
It took a moment for the other to answer. He seemed dazed. Katsuki could practically feel their fear melding together, rolling into something bigger.
“I-I don’t know. The last thing I remember was- I was with nii-chan. We just beat Upper Moon One and nii-chan and I were talking and then I was here.”
Katsuki recalled the words he heard as he was being teleported. Was that this guy talking to his brother? It still didn’t make much sense. What the hell was an “Upper Moon One?”
“Okay, I’m gonna find a way to get rid of you later, but for now, we need to get out of this situation.”
“You’re not doing a very good job of convincing me to side with you.”
“Just listen! We’ll figure your shit out later! For now, let’s focus on not dying or getting captured.”
“Fine, fine. We gotta fight and stall for time. Let me take the wheel. I know how to fight.”
“So do I, dumbass. I’m a hero-in-training.”
“Hero-in-training? Like a Demon Slayer?”
“What the fuck is a De- you know what, that doesn’t matter right now. Point is, I’m pretty fucking amazing, so let me handle this. Those villains are no joke, and I’m not gonna trust someone who needs a gun to protect my body.”
“... Okay. I’m Genya, by the way.”
“... Katsuki.”
Just as they finished making their plan, Katsuki tuned back into the villain’s speech. “I knew you’d come.”
All Might, in all his glory, flew in from the sky, clashing with the villain. “I’ll have you return my student, All for One!”
“Are you here to kill me a second time, All Might?”
To Katsuki’s horror, the villain - All for One, did All Might say? - did not even seem phased. He grabbed hold of All Might’s fists and pushed him back.
“Who is that? What’s going on?”
“How do you not know All Might?”
“You’ve gotten weaker, All Might,” the villain said. “It’s only five kilometers from here to the bar, but it took you nearly thirty seconds to get here.”
“You’re one to talk with the fancy life support mask you’ve got on,” All Might called back. “I’ll lock you up for sure this time, along with your miserable League of Villains!”
“I’m so confused.”
All Might charged at All for One again. “Sounds like it will be tough for the both of us.” With a single blast, All for One sent All Might flying back down the block.
“All Might!”
“Do not fret, child. It will take more than that to kill him.”
“Shit. Where are the Pillars?”
“Tomura, take this child and escape. Use Kurogiri’s portal to get away,” All for One turned to Shigaraki.
“What about you, Master?”
“You’re not thinking clearly.” As All for One spoke, All Might rushed back, bruised but not giving up. “There remains much room for you to grow.”
“Let’s go, Shigaraki,” said the villain in the top hat. “While our masked liege keeps All Might busy, go claim your prize.”
The League of Villains turned their attention to Katuski. He crouched into a fighting stance.
“This is gonna be fun!”
The fight began.
The villains attacked in force this time. They weren’t going to let him get away this time, clearly. All Might and All for One were locked in a standstill, but the former was clearly not using the full extent of his power. Because if he did, Katsuki would get hurt, too.
He dodged around Mr. Compress with an explosion. “Can’t let the magician touch me or it’s a one hit KO.”
“How’d you make that explosion? Is it a Blood Demon Art?”
“Huh? What are you even-”
“Left! On your left!”
Katsuki barely dodged the knife Toga threw at him.
“Alright, new deal. I fight, you focus on my peripherals and warn me. No more questions!”
“Got it! Rinse and repeat until sunrise!”
“What? No!”
“Left again!”
Katsuki felt control momentarily slip away as Genya dodged Twice’s measuring tape.
“Huh? What happened to his eyes?”
Katsuki retoke control with a grimace. This was getting worse by the minute. It was a six on one - er, two - battle. Things weren’t looking good for him. He jumped back again, using an explosion to propel himself.
Just as he was about to get pinned, Katsuki heard the sound of the wall behind him breaking apart with a mighty crash. A sudden chill ran through the air as a wall of ice rose up from the hole.
“What now?”
“Hang on, is that-”
A trio of figures flew up the icy ramp, soaring over their heads. Glasses, Deku, and-
“Kirishima!”
The boy with red hair stretched out his hand. His voice, filled with desperation, carried across the battlefield.
“COME ON!”
Shigaraki was reaching for him. It only took a fraction of a second for Katsuki to put out two massive explosions, propelling him towards his frie- temporary allies. He grabbed hold of Eijiro’s hand.
“YOU IDIO- Gah!”
His jesting cry of relief was cut off by control being abruptly snatched away from him again.
“Wait wait wait wait this wasn’t part of the plan!” Genya screeched, clinging to Eijiro’s hand by pure instinct. “We can’t leave we need to go back!”
“Kacchan, calm down!” Izuku yelled. “We need to get out of there so that All Might can fight at his full power!”
“You don’t understand!” Genya yelled back. “The only thing that will kill that guy is the sun! We need to draw out the fight until sunrise! We need to go back! The Pillars will be there soon! Nii-chan will be there soon! I need to help him!”
“What are you talking about?” Eijiro yelled. “Look, just hang on for now!”
“Brace yourselves!” Tenya yelled. “We’re going to land! Bakugo, on my mark, give us a big explosion to keep our momentum up!”
Katsuki shoved his way back into control. “You match my mark!”
“Don’t argue right now!” Izuku screamed. “Get ready!”
“NOW!”
Katuski let out an explosion behind them, propelling them forward. Tenya skidded against the ground, going from a sprint to a run to a jog. The others let go of each other, though Eijiro kept a tight clasp on his hand.
The rough landing shook Katsuki from control, and Genya immediately tried to run back in the direction they came from.
“Bakugo!” Eijiro yelled, keeping a tight hold on him. “What’s going on with you?! You gotta know that guy’s bad news. You can’t beat him!”
“Don’t have to beat him!” Genya yelled back. “Just- keep him there till the sun rises! You guys don’t understand how much trouble we’re in!”
Tenya and Izuku ran over to join them. “Kacchan, what’s wrong?” Izuku asked. “You’re not making any sense right now. You don’t have any siblings. And who are these Pillars? And- what happened to your eyes?”
“Hang on,” Tenya said, carefully observing Katsuki’s face. He grimaced. “Something’s wrong. They’ve done something to Bakugo!”
“I don’t know what your deal is!” Genya screeched. “I need to go back-”
Katsuki managed to grapple control back. He breathed heavily. “This- fucker… hijacked… my body!”
“Kacchan!”
Control was once again swiftly taken from him.
“I didn’t hijack anybody! I don’t know what’s happening! I just know that that guy is Muzan fucking Kibutsuji! He’s dangerous! You’re all in danger!”
He glanced around wildly. “Where are we? Where the fuck are all the Demon Slayers and the Kakushi?”
Genya once again tried to scramble away. “Oh, no,” Eijiro practically growled, his normally good going nature gone. “We’re not letting you go anywhere with our friend’s body.”
“Is this some kind of brainwashing Quirk?” Izuku mumbled to himself. “Memory manipulation? Or- did the League of Villains already perform some experiments on him? There’s no way Kacchan would have joined them willingly, so they must have tried to make him join by force! We need to get him to Recovery Girl, or Mr. Aizawa! They’ll know what to do!”
Tenya’s phone rang. “Todoroki,” he murmured, picking it up. “Yeah, we’re safe… But, Bakugo’s acting oddly. We believe the League might have done something to him. He says his body has been… hijacked.”
“I didn’t hijack anybody!” Genya repeated in desperation. “Please! Just let me go or my friends could die!”
Eijiro’s grip faltered. “Friends?” Katsuki knew why Eijiro felt confused. Even if, in some deep down, almost fully obscured part of his soul, he thought of them as friends, he’d never say it out loud.
“Yes, my friends! They’re probably fighting Muzan right now! And my big brother, too! We only just reconciled! I can’t lose him again!”
Izuku, Eijiro, and Tenya looked at each other in confusion. Katsuki tried to claw his way back to the pilot’s seat, but it seemed as if Genya’s pure adrenaline rush kept him locked in. Katsuki vaguely became aware that there were tears rushing down his face. Great. Not only did Genya hijack his body, but he was also making him look like a fool, like a weakling-
“Hey, Baku- dude,” Eijiro said uncertainly. “Are you okay?”
“N-no.”
Tenya took an authoritative step forward. He leaned down a little. “Alright, let’s get to the bottom of this. Are you or are you not Katsuki Bakugo?”
“Yes.”
“No, my name is Genya Shinazugawa. I’m a member of the Demon Slayer Corps.”
“The Demon Slayer Corps?” Eijiro repeated, sounding even more lost now.
“Yes! We kill demons! And the biggest, baddest demon is wreaking havoc right now! You have to let me go!”
“We are not done yet,” Tenya said. “Okay, uh- Genya, what year is it?”
“It’s the beginning of December, 1915.”
This caused Eijiro to stumble back in shock. Tenya’s eyebrows rose up. “1915? You’re- you’re off by nearly half a millennium. It is the end of July, 2403.”
“Wh-what?” Genya stuttered. His voice grew weaker. “No. No, that can’t be- No-”
He drifted out of control, lost in thought. Katsuki was quick to retake control of his body.
“Let’s get out of here, before that hijacker comes back,” he grumbled, quickly swiping at his eyes to brush away the tears that fool had shed.
“Bakugo? Are you back?” Tenya asked.
“Isn’t it obvious?” Katsuki growled, yanking his hand away from Eijiro. “And not a word about this to any of our classmates. I’ll deal with this on my own.”