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They were at Endeavor’s hero agency, ready to learn from him to improve in their weaknesses and become better heroes altogether. The three of them (Shoto, Katsuki and Izuku) were all talking about their last training session with Endeavour and how they can build on themselves with their knowledge, when suddenly Endeavour gets called out onto the field for a massive villain attack; a group of 5 villains, unknown quirks, and they are all terrorising a block of buildings and causing havoc and commotion. Endeavour sets off, his pupils following, engaged in their learning and aware they have no idea what they could end up facing. Arriving at the scene of the crime/s, Endeavour takes Shoto off with him to go defend and fight the criminals and leaves Katsuki and Izuku to save civilians and bring them to safety, reluctantly (after a lot of bickering) Bakugou agrees and heads off with Izuku.
“Kacchan, there’s debris over here, help me search for people?”
“Yeah, whatever nerd, let’s just get this over with so we can go help with the fight.”
The two of them rush over and start lifting up the fallen bricks and pipes so they could rescue injured survivors, a woman was cradling her infant in her arms, just as Deku is about to take the crying child from her so Bakugou can lend a hand to the mother he gets a blow on the back, simultaneously, Katsuki does too. They immediately turn around to see a man covered head to toe in cloth, he’s got a black hood on which covers any details of his face, and gloves and long sleeves to hide his arms whilst this dress like clothing covers his legs.
“YOU’LL PAY FOR THAT YOU IDIOT!!” Dynamight charges towards the villain, leaving Deku time to help the mother and her child and bring them to a safer place before returning to support his teammate.
Katsuki bolts into a fight, throwing explosions down onto the villain, making it impossible to even be able to see him in all the ash and dust that follows. As he zooms down the ground expecting to find this criminal’s neck in his hands he finds nothing and instead is pinned down to the floor with a knife held the back of his throat.
“You have no idea the ride you’re in for…” the offender says smirking and as he is about to flee the scene of the crime, he gets kicked around the back of the head before being knocked out completely.
“KACCHAN! ARE YOU OKAY?” Izuku, the protective man he is, grabs the blonde’s face and checks his neck for any harm.
“GET OFF MY YOU DAMN NERD!” he allows the greenette to touch his face for just a little while longer before shoving him off and sighing, “yeah ‘m fine.”
The two of them hand off the criminal to the police before rounding up the rest of the bystanders and injured civilians who need help before returning to a very exhausted Shoto and Endeavor. All three of them head off to their dorms after a long night of fighting and get some well earnt rest, but Katsuki (despite being severely strict in his sleep schedule) cannot sleep a wink. His mind whirs as the words of the man race throughout his mind.
‘Me and that nerd where both hit;’ he looks down at his arms, ‘does that matter?’
He knows there is only one person he can go to about this, especially because he could be affected too.
‘Fucking nerd, I always find myself in problems when you’re around.’ He exits his room before knocking on Izuku’s dorm.
“Oi nerd,” he says quietly, “we need to talk.”
A tired Midoriya opens his door and immediately wakes up before realising he sees KACCHAN there, he looks down at himself, realising he has no shirt on, and his trousers are practically falling off him, revealing as much off him as he can. He pulls the other man into his room before closing the door and blushing immediately. Katsuki is in just as much shock as him.
“KACCHAN!?” he whispers yells, “WHAT ARE YOU DOING OH MY GOSH YOU CAN’T LOOK AT ME LIKE THIS!” he takes a second before he recognises his own words and just goes blank.
“Wha- “
“Why are you here Kacchan?”
Katsuki rubs the back of his neck before breaking eye contact with Izuku and just begins to stutter, leaving Midoriya incredibly confused. ‘Is Kacchan nervous?’
He can tell the boy is in distress so brings him in for a hug, one hand combing through his hair whilst the other is down at his waist.
“Is something bothering you?” he utters out after a while before pulling away from the hug and taking Bakugou’s face in his hands and tilting his head diagonally, puzzled.
“It’s about the fight today Izuku,” he exhales, “I can’t sleep, the man said something before you showed up, about his quirk, he said I’m not ready for what’s about to come. You also got hit by the quirk so I thought I should tell you, manners at all that shit.”
He puts his head down into the smaller boys’ crevice in his neck and puts his hands around his waist and embracing him, Izuku feels a tear run down his back and hears muffled and quiet sobs coming from the man he has known his entire life.
He rubs Katsuki’s back before making ‘shh’ noises, in a way to comfort him before kissing the top of the blonde’s head.
“Kacchan, if anything goes wrong we will tell Aizawa Sensei okay, we have Recovery Lady and him to help us through whatever that villain has sent out way,” there is no response from the blonde, so he just says, without even thinking, “stay here tonight Kacchan. Then we can wake up together and see if we are okay.” Katsuki takes his head away and looks at Izuku’s single bed, the offer is tempting but how are they even going to both fit in that? I mean they used to when they were little kids sure, but they were LITTLE kids."
“Izuku- your bed is tiny.”
“Oh, come on Kacchan, it’s for one night, besides we’ve known each other our whole lives if there’s anyone you could share a bed with comfortably it has to be me.”
He ponders the thought for a while before climbing into the bed and closing his eyes, falling asleep instantaneously. Izuku smiles at him and lies down next to him, completely squished but he will make do. Following Katsuki and sleeps immediately.
Midoriya’s alarm goes off at 5.45am and wakes them both up, Kacchan turns over to slap Izuku for not warning him about his alarm, but he is overcome by too much shock to even react. Expecting to see a freckled boy getting out of bed to switch off the alarm he sees himself, he reaches his arms out in front of him and just stares in horror.
“I-Izuku...?”
The blonde boy turns around in dismay as he hears his OWN voice calling his name before replying, “Kacchan…?”
The two of them meet their gaze, as if it’s a fake scenario, the taller boy walks over to the one still in bed and just punches him in the face, expecting him to wake up from this nightmare.
“OW, WHAT DID YOU DO THAT FOR YOU DAMN NERD!?”
Not a dream.
“DAMNIT KACCHAN!” his voice is louder than usual, and he realises he needs to stay quiet, or he’ll wake up the others.
“I- you have training with All Might to figure out more of One for All in 15 minutes, we’re going together.”
Before Katsuki can even begin to detest, he is being handed an outfit him to change in to and sees himself pick out an outfit too.
“Change, now. We do not have time to get to your dorm.”
Bakugo just blushes slightly (In Izuku’s body), “uh? Do you have somewhere I can change?”
“YOU’RE IN-,” he sighs before lowering his volume, “you’re in my body Kacchan, I have already seen it entirely.” He rolls his eyes and begins to strip before putting his clothes on.
“OI GET YOUR EYES OFF MY BODY YOU FREAK!?”
“Will you shut up just for once Kacchan, my goodness, we can talk about that stuff after we managed to both sneak of out of my damn room.”
The two of them change into their outfits and Katsuki follows Izuku’s lead to get to All Might. When they managed to escape the dorms and are safe away from everyone Izuku begins to freak out.
“OH MY GOD KACCHAN, THAT GUY’S QUIRK MADE IS SWITCH BODIES SOMEHOW OH MY GOD OH MY GOD, I DON’T FEEL ONE FOR ALL INSIDE ME ANYMORE AND I ALREADY TRIED USING IT SO NOW I HAVE YOUR QUIRK AND I DON’T EVEN KNOW HOW TO USE IT, OH MY GOD KACCHAN THIS IS SO SO SO BAD!”
Kacchan covers his face with his hands before turning around and replying, “QUIT YELLING YOU DAMN NERD, THIS IS SOMETHING SERIOUS AND I DON’T WANT TO BE IN THIS DAMN BODY, I WANT MINE BACK.”
The two boys pause and stare at each other, before they sigh coordinated. They continue walking in silence before they are greeted by All Might, Kacchan (as Izuku) approaches first.
“Ah, Young Midoriya!” All Might notices a shift in his expression, “is everything alright?”
Izuku follows shortly behind, beaming from ear to ear to see his teacher.
“All Might! Me and Kacchan have a lot of explaining.”
All Might looks at the two of them confused, staring at one and then the other numerous times before finally letting out a laugh.
“OH MY GOD,” he begins to catch his phrase, “DON’T TELL ME YOU SWITCHED BODIES!!!”
Katsuki rolls his eyes before saying ‘tsk’ and is about to walk away, fed up of almost everything this morning.