Prompt: You should do one of when Izuku and Bakugo were kids. So readers can see how horrible they were to each other, since they were both little shits.This probably isn't what you meant, but okay!Warnings: Abuse/Bullying

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Dramatically, I grab a milk jug, down that whole bitch, and throw the now-empty jug to the side.

So, you want to see how much Kacchan and I hate each other?

Alright. But I would like to mention that Kacchan started it. I did not start until two years later after he started. I lost all control when I was six.

That day was beautiful. Actually, REWIND TIME!

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I am working on a little toy at recess away from all the kids because they are jerks. I found a little robot ball when I was looking from Mom's stuff, and asked if I could have it. Thankfully, she had no problem handing it to me. I'm trying to get it to work because it looks so cool! It looks like it can do a lot, and I can add to it!

"Shut up, Deku! What are you doing?! Working on another one of your stupid experiments?!" I look up to reluctantly to see Kacchan looking down at me. I must have been muttering again.

"Y-yes. I-I'm trying to get it t-to work!" I exclaim as I show the parts to Kacchan. I see the other kids around him start to laugh, but I don't know why.

"I can help with that." He says, raising his hand for me to hand it over. As I am very naive, I hand it over.

BOOM!

The ashes of the previous pieces drop. I start shivering on the verge of crying, "T-that's not helping, K-Kacchan! It's r-ruined now!"

"What are you going to do? Cry about it?" Everyone starts laughing at me. A familiar feeling fills my stomach, but I push it down because it's not nice to be angry at people. It will just get me in trouble again anyway.

"N-no!"

"You're so useless, Deku! I don't know why you bother with this shit anymore! You should just give up!"

Something snaps in me when he says that. A raging fire that I have been pushing down since the beginning explodes.

My tiny voice spits out, "G-give up? Really, K-Kacchan?" I look him square in the eyes, "I-I'm done with you pushing m-me around! Just b-because you have a quirk doesn't mean you g-g-get to b-b-bully me! IT'S WRONG! T-T-THIS ISN'T WHAT A H-HERO IS, KACCHAN! I W-WILL SHOW YOU WHO A R-R-REAL HERO IS! WATCH ME!" In an instant, my fist connects with his face. Kacchan screams as he explodes me away with one hand and grips his nose with another. I step back with a smile like All Might.

"YOU STUPID DEKU!" Kacchan tries to approach me, but I watch his moves and dodge to the side.

That's when the teachers come and stop us.

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That day, Kacchan got away with it while I got in trouble for disobedience. That's when I gained my spirit and learned my meaning.

I needed to prove him wrong and give hope to the quirkless.

That's just the beginning. I got in trouble so often that I pretty much didn't even bother going to the office. I would just go straight to detention.

Yet, Kacchan never got in trouble. But damn, it was worth the bloodshed every time.

Over time, my emotional side and stutter went away. That Izuku is a shell that has been ripped apart to reveal me.

With who I am, bloodshed got boring. I needed to find a new fun.

I did just that.

This next time skip is when I am eight.

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"GET BACK HERE, DEKU!" Kacchan screams from behind me. I grin.

This is going to be fun.

While I am running, I jump high over something Kacchan can't see. Something he runs into. I make sure to go ahead before spinning around to watch.

Kacchan gets caught in clear fishing wire, causing him to abruptly fall to the ground. After a few clicks echoing the alleyway, large trashbags fall on top of him. I hear him screaming from under, but I am not going to help him. He will explode that in a moment or two.

I giggle, "I guess the trash got taken out where it belongs." As guessed, the trashbags suddenly explode with trash going all over the place.

I take that has my chance to throw down a homemade smoke bomb with tear gas and zoom off.

TAKE THAT, KACCHAN!

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I still don't feel guilty for that. Kacchan has done some shit to me that has nothing compared to that.

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I'm sitting in class doing notes for a new gadget when the bell rings.

I don't get a chance to pack up when I feel an explosion on my shoulder. I am roughly thrown out of my seat against the wall where I feel my head harshly slam the window.

Where is the teacher for when this stuff happens? I bite my tongue.

"YOU THINK YOU CAN GET AWAY WITH SHIT, DEKU?! GUESS WHAT, YOU DONT!" Kacchan screams.

Laughter fills the air when he sets multiple explosions off on my back. I can practically taste the adrenaline when I kick him in the stomach backward. I take the chance to spin around, but I fall to the ground.

I must have a concussion. I read about this in one of mom's medical books. I can't let it stop me now.

Roughly, a hand lifts me into the air.

"REALLY, DEKU?!" More explosions go off.

How is this not illegal?

Desperate, I reach in my pocket and pull out my pocket knife, "Put me down or else."

That freaks Kacchan out as he drops me, and the kids scurry to the wall trembling. I stumble out of the room and go as far as possible before passing out on the street.

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It turns out that I did have a concussion!

AND I GOT INTO IMMENSE TROUBLE FOR HAVING A KNIFE EVEN THOUGH HE HAS FUCKING EXPLOSIONS!

Damn, Kacchan and I were fucking sociopaths back then.

Welp, I hope you enjoyed it!