Me: So… I saw a lot of KamiDeku fics and although I don't ship them, I find their friendship adorable. Enjoy!

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Normal POV!

"What the fuck is a Kicchan?!"

Izuku is, for lack of better word, confused. Here before him stands a boy his age glowering him down, the said boy towering over him by six inches as he attempts to disintegrate him with his eyes, red and narrowed and filled with anger. A few distance away, he could hear a full blown laughter that never seems to run out of breath.

Izuku tries to ignore both, eyes shifting away from the paler blond uneasily. "I–it's uhm… it's a nickname of sorts… that I used to call Denki when we were kids."

Silence, and then…

"Fucking, what?!"

Izuku lets out an 'eep!' and shields himself from the unexpected explosion coming from the taller man's hands, shrinking away as he grabs the closest person situated near him, which happens to be Kaminari.

… who was still laughing —the traitor, Izuku pouts.

"Bakugou, calm down man!" a redhead grunts, having grabbed the angry man by the arms to stop him from attacking Izuku, activating his quirk in the process that enables his body to harden like a rock, which, awesome!

And the man, Bakugou, growls, like a beast, and Izuku couldn't contain the whimper that escapes him as he tucks himself further behind Kaminari.

"C'mon, dude, you're scaring Midoriya." a black-haired boy says, having what looked to be tape dispensers on his elbows as he stands between him and this Bakugou-dude that seems to be out to get him. "And you heard what Midnight-sensei said! It's not Midoriya's fault, he's just a little… confused."

Izuku nods at this almost anxiously as he makes eye-contact with Bakugou, who seems to have calmed down from lashing out but stayed as angry. "I–I don't know what's going on, but I'm sorry!" he says in a panic, bowing his head as best as he can against his giggling human shield. "I'm s–sorry! Please don't be mad!"

His eyes stay shut, but he hears a huff and relaxes slightly when he feels that Bakugou has no further plans to possibly maim him, and he lets out a breath in relief as he leans against the suspiciously quiet electric blond at his side.

For a while it was quiet, but then Denki opens his big fat mouth.

"So, Izu-chan, why don't you tell us more about your precious Kicchan?"

An explosion, this time louder, and all hell breaks loose.

Izuku resorts to burying his face against the chortling blond's back in both fear and exasperation.

~•~

"So what you're saying is; you and Kaminari grew up together, having been friends since childhood, stayed friends because your moms are friends, and the name 'Kicchan' stemmed from when Kaminari asked you to call him Denki and you were too embarrassed to call him by his first name so you made him a nickname on the spot and now it just stuck, is that right?" the redhead, Kirishima, explains in one breath as Bakugou watches him like a hawk from behind.

Izuku sweat drops, but nods as he hugs Denki closer, being the only one familiar to him.

Bakugou apparently doesn't appreciate the gesture and glares harder.

Izuku gulps.

Kirishima lets out a sigh as he rubs his forehead in exasperation. "See, the thing is, Kaminari isn't your childhood friend." Izuku perks up, having finally heard an ounce of explanation as Kirishima continues. "It's Bakugou." bluntly says Kirishima, jerking his head towards the said man's direction as he says blankly, "Bakugou is your childhood friend. And it's not 'Kicchan,' it's 'Kacchan,' and you started calling him that because you were too young to pronounce 'tsu' correctly from Katsuki."

Izuku wilts. "Him?"

"Got a problem with that, shitty nerd?" Bakugou sneers like it's an automatic response, and Izuku doesn't know how to feel.

He looks at Kirishima. "Are you sure?" he asks, because try as he might, he just can't see himself growing up with such a volatile man.

Sure, Izuku is a little disoriented as of the moment, finding some truth in what little explanation they provided about him getting hit by a stray quirk, but Izuku still remembers bits and pieces from his memory. He knows he has a childhood friend who's blond, has an excitable personality, and a quirk dangerous enough that he can vaguely recall some incidents where the quirk hurts him by accident, but nothing about explosions or anger!

And, well, Izuku may not remember much but he knows his friend mellowed out throughout the years, especially when they got accepted into U.A. So that explains why Denki wasn't flirting with every girl they passed by in the halls while travelling from the infirmary to the dorms.

Kirishima nods, almost solemnly, and Izuku sags, sighing as he pushes himself up from his hiding spot behind Denki. "Uh…" he starts, gazing at the red-eyed man, wondering how to interact with his supposed childhood friend.

The man, Baku–Kacchan remains stoic, leaving the room in awkward silence as Izuku droops, face morphing from apprehensive to stressed in seconds causing Kirishima to elbow the silent blond to chide him, before he feels an arm wrap around his shoulders, the green-eyed teen immediately relaxing in the comforting hold as he turns to face Denki.

"Don't mind him, Izu-chan." he says teasingly, earning a scowl from from the explosive blond as Kaminari turns to face Izuku, leaning in to whisper conspiratorially in his ear, but definitely loud enough for the entire room to hear, "We may not have grown up together like you and Blasty over there," a thump, Kirishima having blocked Bakugou's advance, and Kaminari grins, smug as he says, "but we can hang out like we are while your memories are still jumbled."

"What do you say, Izu-chan?" he smirks. "Just like 'old times'?"

The Baku-splosion was loud enough to be mistaken as a villain attack. Luckily, Nezu had a protocol just for that.

~•~

OMAKE:

A Week Later

"Oi, Deku."

"Kacchan?" Izuku questions, glancing up from where he sat on the bench by the courtyard, almost jumping when Bakugou drops a bentou on his lap.

Green meets red.

"You owe me thrice the amount of time you spent with Dunce Face."

"Kacchan?!"

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Me: The BakuDeku in here can be interpreted as platonic or romantic, depending on you. But to clarify, the quirk's effect lasted a week so that's one whole week of KamiDeku going on movie marathons, playing video games, and even eating out together. Bakugou basically asked Izuku to spend three weeks with him doing all the things he did with Kaminari.

Midoriya: But isn't three weeks a bit much?

Me: … he's a very jealous friend.

Midoriya: …

Me: Oh, and if you haven't realized it yet, the title comes from the difference between Kaminari and Bakugou's vibe, one having an excitable personality while the other, an explosive one. Anyways, hope you liked this rushed… thing I wrote. This is the one and only PhoenixNinja101, signing out!

Midoriya: Don't forget - the author now has a link to a discord server (tdNdHA9).

Me: Oh yeah, xD Uhm... please remember that it's NEW.

~~~CHAO!~~~