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Bad Habits

Summary:

Izuku has a dirty secret, and Katsuki is about to find out just how strange Izuku really is.

Notes:

Based on my BKDK animation to Bad Boy by Cascada!!! Follow my tiktok i make great art, trust. i post animations often :P

 

https://www.tiktok.com/t/ZP8f9Vhcs/

(See the end of the work for more notes.)

Work Text:

The sun was glaring down on me as I carded through the thick forests.

I had been given some pointers on where to find the barbarian king, who had been wreaking havoc across the towns, stirring trouble wherever he so pleased.

“That mage said that his hideout should be somewhere around-- Ah!!”

I let out a yelp as I had suddenly fallen into a trap, and plummeted a good few feet into the floor, wincing in pain as I sat up in the tight space..

“D-darn it-- I have to get out before I get caught--” I muttered frantically to myself. That's when a tough-sounding voice made my ears perk up as it approached me.

“You're quite the idiot if you decided to come looking for me.” The voice boomed above the opening of the hole in the ground. I looked up to see spikey blond hair and… a very fit stature above me.

Before I could get a word out, I was being yanked up by the collar out of the hole, and roughly planted on my feet; that hand never left my shirt, though.

I could finally get a good look at his face…

His features were sharp and rugged, yet he had such a youthful appearance for someone who favored terrorizing innocent towns and destroying anything in his path.

His hair was a bit messy and unkempt, pointed in many directions-- and his eyes were as sharp as a blade. His red eyes started to peer deep into me..

To which I realized I had been oddly silent, staring at him, the crease in his brow deepening as he waited for me to say anything.

“I--- you!” I sputtered out embarrassingly.

“Go on, are you going to tell me that you're here to capture me like the many heroes before you did?” He gruffed at me; his voice was so intense it nearly shook my resolve.

I grabbed his hand, still clutching my shirt collar. I furrowed my brows and tried to reach for my sword in it's Sheath, but he narrowed his eyes, and before I could react, he was knocking me to the ground and ripping my own blade from its holster, and holding it to my neck.

“How pathetic. And here I thought you'd at least be worthwhile. All you heroes are the same.” He said, leaning over me, his strong legs pinning my body down.

“Thats what you----”

“OI! DEKU!” Kacchan's loud voice startled me as he slid the classroom door open. I shrieked and slammed my notebook shut. Shakily turning to look at Kacchan, who is speedily making his way to me.

I brace myself and pray that he isn't going to yell at me about something.

“You damn nerd, why the hell are you still in the classroom? We are supposed to be eating dinner at your place right now. Get your ass up!” He snapped at me.

Ah…right.

---

A few days ago*

“We've been a little short on money, so I was so thankful when my boss suddenly gave me a promotion!” Mom said excitedly over the phone. I could hear Kacchan's mom on the other end

“Thats wonderful, Inko! How about we come over and cook dinner? I'll make sure to bring that wine you really like,” Auntie Mitsuki giggled on the other end

“Oh, you don't have to do that for me.”

“C'mon, I insist. And the boys can at least spend some time together too,” Mitsuki said

“Well… I suppose if it's really okay.. would Friday evening be okay?” Mom asked

“Of course! I'll see you then~”

Kacchan coming over for dinner? I guess that means I should clean up my room before he gets here…

--

Currently*

I started to sweat nervously as we got closer and closer to my apartment.

I did NOT end up cleaning my room…

Okay, think Izuku, think. I can obviously just tell Kacchan not to go into my room yet, but i know he is just gonna wanna defy me and go in anyways.. and auntie and Mom will obviously tell us to go hang out in my room until dinner is ready… i can lie and say.. maybe my dirty clothes are everywhere but then Kacchan would scold me really hard, and i want to keep Kacchan as calm as possible… oh gosh did i leave my notebooks out? Kacchan isnt much for snooping.. well sometimes he is, i can maybe lie and say it's just my homework.. kacchan shouldn't question me otherwise.. all i have to do is be calm.. maybe if i run into my room and lock the door before he can come in it'll buy me some time before he breaks in… hopefully he doesn't Blow up my door, id hate for kacchan to get yelled at by auntie and--

“Deku, what the fuck are you doing just staring at the door?” Kacchan's voice broke me out of my thoughts, “Open it already.”

We were standing in front of my apartment door…

Suddenly, my hands trembled nervously.. Okay.. this is fine.

I fumbled with my key before opening the door with a click. I could hear voices in the kitchen. Auntie must be here already.

Kacchan and I took off our shoes and walked towards the kitchen together. My mom and Auntie Mitsuki were already preparing dinner. Kacchan's dad was standing near the opening of the kitchen, chatting with them.

Suddenly auntie caught a glance at me and grinned widely before setting down the knife in her hand and walking over to Kacchan and I.

“Izuku! How have you been, kid?” She asked, pinching my face. Her hands smelled like bell peppers.

“I'm doing good.. It's Nice to see you again,” I smiled sheepishly. I snuck a glance at Kacchan to see him scowling a bit..

“Thats good, you boys go hang out for a bit. We'll call you when dinner is ready, and i dont wanna hear you boys fighting, got it?” She said as she let go of my face, motioning for us to leave the kitchen. Kacchan brushed past me and made a beeline for my room, the pit in my stomach deepening.

“K-kacchan wait- i want to change my clothes first..” i sputtered out, catching up to him

“So then change your damn clothes, why do I care?” He huffed as he reached for my door. I felt my life flash before my eyes

“B-b-because--” I sputtered as he opened the door. This is it, Kacchan is going to finally put me in my grave.

I braced my body for an impact or anything but wearily opened my eyes to silence and the shuffling of Kacchan sitting on my bed.

I looked around my room.. it was…clean?

Oh god-- never have i been more thankful for my mom right now.. she…she cleaned my room for me--

My eyes snapped over to my desk, where my notebooks were piled neatly on top.. and then my soul left my body.

My.. i left my… book from last night out in the open.. oh gosh i really hope mom didn't read it.. oh gosh

Kacchan was quick to notice how fidgety I was acting.

“What the hell is your problem, you damn nerd?” He scowled at me, I looked at him and desperately tried to put on a brave face. The upside is Kacchan isn't going to yell at me for how bad my room is, but the downside is that..mom probably will later.. and if she reads my journals… I don't even want to think about it.

“Nothing kacchan..” I mumbled awkwardly..

It's been a while since Kacchan and I actually hung out… things haven't been really good between us for a while.. Most of the time we are together consists of Kacchan yelling at me.. i should be thankful he is acting calm right now.. but i can tell by the way he is sitting he's already climbing up to being a little annoyed

Awkwardly.. I walked over to where he was sitting on my bed, and sat as far as I could from him to not irritate him.. and before i could say anything to him he was already speaking up.

“Your room is still as dorky as ever.” He huffed, his eyes scanning my bedroom..

I just laughed awkwardly..

“It's been a while since we actually hung out, kacchan.. I'm sorry if I don't have much to do here..” I said sheepishly, fiddling with the buttons on my school uniform.

Kacchan scoffed a little

“Tch, I don't really care. We're not little kids anymore. It's not like we have to run around and play with each other all damn day.”

“ah well… have you done today's homework yet..? Actually.. i wanted to ask you for help.. Kacchan is so smart, and i was a little stuck and--” i muttered sheepishly

“If you want my damn help, just ask.” He huffed, getting up from where he was seated.

“Y-yes! Thank you..” I scrambled to pull my homework out of my bag and quickly sat down at my desk, shoving my notebooks aside quickly, Kacchan leaning over beside me to see the questions on my paper. I squeezed my pencil in my hand nervously as he stared down at my paper with a deafening silence.

Then he suddenly scoffed

“You got this wrong,” he said, pointing his finger to the first question on my paper

“I-- what?”

“That part,” Kacchan tapped again, “do you ever pay attention in class or are you always busy writing in your damn nerd notebooks?”

I sputtered a bit

“I.. I pay attention..” I said quietly, my shoulders stiff as I clutched my pencil

“Could've fooled me.” He huffed, “fix it”

I frantically erased my answer and mulled over the question again, writing slowly, sneaking a glance at Kacchan to see if he was gonna give me any sign that I was correct this time.

He stayed quiet as I scribbled a new answer, and then quickly pointed to a different one.

“You got this one wrong, too. You're supposed to carry the X” he said to me..

“Oh… you're right,” I said, erasing part of the answer to fix it. Looking at him for some sort of approval.

Judging by his silence, I think it was right. I then moved my pencil to look at the next question, the page was empty past that point.

I stared at it for a little while, chewing on my inner lip. I really do need to pay attention a bit more…

I looked at Kacchan again, whose brows were furrowed like he was ready to take my pencil away and do the homework for me.

“Geez, can you do anything for yourself?” he said, snatching my pencil away and pulling the paper to himself.

“Sorry kacchan.. youre just so much smarter than me.. I guess it's a little intimidating with you hovering over me..” I blushed a bit.

“Damn right I'm smarter than you. Don't make me tell Auntie you're slacking.”

“C'mon! You wouldn't do that!” I whined

Kacchan shoved the paper back towards me and tapped the answer

“Look, do you understand now?” He asked me, his eyes pinned on me..

I looked between him and the paper..

“Oh! Ohh… I do now! Thank you Kacchan I--”

“Boys!! Dinner is ready!” Auntie Mitsuki called out from the hallway.

“We can finish this after dinner, get up nerd.” Katsuki said, dropping the pencil onto the desk and walking out of my room, I quickly stumbled after him and walked out to a delightful smell of dinner in the air.

As we sat down at the table together, my mom was bringing our plates over, we waited patiently as auntie, uncle and my mom came with their plates as well, sitting down in front of us.

“Thank you again for coming over again,” my mom said to Auntie Mitsuki

“Really, it's No big deal, it's always nice to see your cute face again” Mitsuki chuckled

Kacchan and I began to eat in mostly silence as our parents talked about.. well, whatever it is adults talk about. It wasn't till uncle Masaru said something to us both that Kacchan and I looked up from our plates

“Hah?” Kacchan said, his mouth full of rice

“Katsuki, don't talk when your mouth is full!” Mitsuki scolded him

Kacchan choked a bit trying to swallow his food, before finally answering again

“I didn't hear you, Dad.” Katsuki said

“Oh, I was just asking you two what high school you plan to attend,” Masaru said.

“Ua, obviously,” Katsuki huffed

“Izuku?” He asked

“Ohh.. um.. I haven't really thought about it yet…”

I DID think about it but.. Kacchan was next to me and i think he might get mad at my answer.. i wasnt gonna ruin a good dinner.

“My little Izuku is very creative when it comes to designing outfits for his little hero books he writes! Maybe we could enroll you in a program to make support gear and costumes for heroes,” Mom said cheerily.

“M-mom!” I whined

Our parents laughed a bit and went back to talking. I shoved food into my mouth, hoping to escape from this as fast as possible.. How mortifying.

Seems like Kacchan had a similar idea because as i was finished clearing off my plate, Kacchan was standing up and grabbing our empty plates, walking to the kitchen quickly..

“Ah-- kacchan and i will be in my room.. thank you for dinner auntie” i bowed awkwardly as Kacchan walked past me towards my bedroom again, i quickly followed past him, not hearing what Auntie quipped at me..

Thankfully, this night would be over soon.

---

“It was great to see you two again, maybe next time you two should come to our place for dinner,” Auntie said as she stood at our front door, Kacchan putting his shoes back on, and his bag over his shoulder.

“Id love to! Let's talk soon okay? Have a safe trip home you three” mom said as they walked out the door together.

“Bye kacchan… ill see you monday" i said awkwardly

He gruffed out a quiet bye as he closed the door behind them. I could hear their muffled talking through the door as they walked away.

I said a short goodnight to my mom as I trudged sleepily to my room. Now that Kacchan is gone i could finish writing that story i was working on.

I shut my door quietly and finally changed out of my school uniform, sitting down at my desk and leaning over to open my bag up, sticking my hand in to pull out my notebook.

…?

The book I pulled out is not..

I quickly opened it, my eyes going wide as I flipped through the pages.. it was just class notes.. this was… Kacchans handwriting..

I dropped the book on the table, and shot out of my seat…

“Ka..kacchan has my bag. Kacchan has MY bag.. with my..m.m..mmmmmy…" I heaved, my face red with embarrassment and sheer horror..

Oh no no no no nonono

This is terrible, awful!! What if Kacchan notices the bag isn't his-- if he sees my notebook---

I threw myself into my bed, and hid under my blanket..

Kacchan is going to kill me on Monday……

----

I walked back into my room, drying my damp hair with my towel. I spent too much time helping stupid Deku do his damn homework, i didnt even get to do mine.

I sigh and pick up my bag, setting it on my desk and opening it up. I should finish quickly so I can sleep.

“Hah…?” I pulled out a notebook that was *not* mine from my bag..

“Fanfiction number 4…? The fuck is this?” I furrowed my brow as I flipped open the book to the first page

On the top corner of the page there was a little…drawing of me?

I scoffed a bit, is this the type of lame shit Deku does in his journal? Write fanfiction?

I almost let out a laugh, till I flipped to the second page and skimmed what was on the paper.

What the..fuck?

‘Somehow I haven't written any au’s where Kacchan and I are girls. I wonder if our relationship would be different if we were women instead.’ It was scribbled in the open margin at the top of the page, and underneath that at the first line of the paper, was a whole…story.

“Whaaat the fffuuuck…??” I gasped and sat down on my bed, clutching the book in my hands, a searing heat was burning into my skin and face.

~

“Kacchan~~ don't you want to go shopping with me” I hummed, grabbing onto her arm. She turned to me with her usual sharp look. I could see the slight blush on her face from here.

“If you stop freaking whining, I will, geez.” She huffed at me, trying to pull my hand off her but I was adamant.

“Really!? Promise me you won't get bored either?” I grinned

“I said yes already you damn nerd! You're gonna make us late for class!” Kacchan said, smacking my hand off her, patting her uniform down before grabbing my hand and dragging me off to class

This means… Kacchan and i are going on a date!!

~~

I covered my mouth with my hand, squeezing my jaw tightly as I felt redness creeping down my neck.. this has to be a prank or some shit. Deku is actually fucking with me right now.

I urgently skimmed through the pages; there were several oneshots where Deku and i were the main characters. Every fucking story with endless amounts of weird fucking romantic slop between me and Deku.

I started feeling dizzied by all this and promptly shut the notebook and threw it at my desk.

I'm Gonna go to sleep, and Deku is gonna give me a straight fucking answer on Monday.

---

This has been the longest and most painful weekend of my life.

There's no way Kacchan DIDN'T read it. He had a whole 2 days to do so. I'm so screwed I almost want to skip school today. Maybe hang out at a park all day and hope Kacchan de-aggros.

There is no way I am getting out of this…shiiittt…

I felt my heart in my stomach as I got closer to school.. my head on a swivel as i looked around, paranoid Kacchan would snea--

“Deku.”

“wwAACCHAN!!!” I shrieked, tumbling back, and I looked at Kacchan, his expression unreadable.

“H-h-hheyyy kacchan… good morning…” i said visibly shaking

“Give me my damn bag.” He huffed at me. Shoving my bag onto my chest.. I frantically took his bag off my shoulder and handed it to him.

“S….so… did you want to walk to school together…?” I asked, praying he didn't read my book.

“I read your stupid little fanfiction.”

Fuck.

“O--ooh! Um-- yeah so-- about that i-- ummmm.. i…” I couldn't keep my words from fumbling out of my mouth, my tongue felt dry and thick as I tried to spit anything coherent out, but Kacchan just kept staring me down with his.. piercing glare.

He crossed his arms, and he avoided my eyes. I could tell he was chewing on his cheek-- like he was trying to wrap his head around everything.

“So is that what you think of me, hah?” He asked, his tone was harsh.

This is where I die.

“K..kacchan i'm..i'm really sorry…” I whined, covering my face. I couldn't bear to look at him. Kacchan will never forgive me for this.

“I have half a mind to kill you right here, Deku.” He emphasized his name with a vicious tone “do you think this shit is funny?” He growled “writing weird shit about us behind my back?”

“N-no! I don't kacchan-- i-- it's Just--” I felt time slowing, I should start saying my prayers.

“Spit it out already!” He shouted at me

“It's Just--!! That I really like you kacchan and I miss being your actual friend and I miss us being with each other all the time but ever since we got older you started getting meaner and so I tried to make myself feel better by writing stories about us but it eventually spiraled into me realizing i was in LOVE with you and i took it too far and i'm so sorry kacchan please dont hurt me!!!” I shouted out, my hands tightly cupped around my face. The silence was so deafening I almost thought Kacchan walked away from me.

“Youre fucking… what…? What?” He said, his tone was unrecognizable

“I'm Sorry Kacchan…” I whimpered, dropping to my knees, going to lean down and shove my head to the floor in an apology, when I was suddenly stopped by the tip of his shoe pressing into my chest.

“Stand the hell up, dont fucking bow to me in public youre gonna make people stare.” He hissed at me, I frantically got back up.. i couldn't look him in the eyes, my eyes starting to feel hot with tears. This is the worst moment of my life.

“We're not fucking talking about this here. Let's go.” He hissed at me, and grabbed my hand.

Like my actual hand.

HES HOLDING MY HAND??

I stumbled and followed him, seeing as he was literally dragging me away. I used my free hand to frantically wipe my face, trying to hide the fact I was nearing tears.

It felt like the longest 5 minutes of my life that it took for us to get to school, except Kacchan completely avoided the front entrance of the school, instead dragging me around the school, towards the back where the cleaning supplies shed was. And shoving us behind it where literally nobody would see or hear us most likely.

This is it. I'm actually about to die behind a cleaning shed. Nobody will ever find my body, probably.

He let go of my hand finally, shoving it away before turning to me with a scowl.

“How long.” He said

“What..?”

“How long have you been writing weird fucking shit about me and you, Hah?” He asked. Yeah, it's over for me.

“i.. uhm… about.. a year…or more..” i said meekly

“Jesus christ” he said, squeezing the bridge of his nose, his eyebrows crinkled.

“Literally, why didn't you just.. I dunno, say something to me?” He asked

“Because you would have blown me up like you always do…” i muttered

“Dont test me right now, Deku.” He spat out "I'm Serious. Instead of being a fucking creeper and writing fanfiction about us like a loser, you could have easily gotten your point across if you had some fucken balls.” He scoffed

I opened my mouth to speak but was quickly cut off.

“And ALSO.” I flinched at his emphasis.

“You're a lousy fucking friend if you cant even write me properly. Youve known me for like 10 god damn years and yet you think i'm Actually that big of a cornball to fucking cry over something as weak as a meadow of flowers? And whats with your obsession with one of us almost fucking dying? It gets really fucking boring after the 3rd time. You need to be more creative with your plots because this is some real bullshit.” He rambled angrily at me.. my expression falling into shock and utter confusion.

“And one more thing” he huffed “if i was gonna fucking kiss you, or literally anyone for that matter i'm not gonna be a sappy fucking weirdo about it. If you're gonna write your gross fan fiction, at least do it right.” He scoffed at me.

I sputtered, staring at him with my mouth wide.. what do i even say?? His…critique of my writing kinda hurt my pride more than confessing my love to him did.

I don't know why, but before I could stop myself from speaking, the words fell from my mouth quickly.

“Then… tell me how you WOULD kiss someone.” I said, my brows tight as I stared intently at him.

I saw a brief shift in his expression, the way his eyes widened suddenly at my question. I should have kept my damn mouth shut.

I could almost see the gears in Kacchan's head whirring, his eyes flicking across my face like he was trying to read me.

My stomach churned. He's gonna hit me. Or yell. Or both probably..

“Fuck you.” He said before shoving himself towards me and kissing me hard. I felt my knees nearly buckle under me.

His hand tightly gripped the collar of my uniform. Kacchan's mouth tastes like toothpaste mostly..

Wait.

Holy crap holy crap OH MY GOD this is not happening right now there's no way this is happening right NOW.

Kacchan pulled away from me, and quickly turned away.

“That's how. You better get it fucking right next time.” And then he stomped off. Leaving me standing behind the shed, clutching my chest like I was having a heart attack.

I may be having a heart attack right now.

-----

I'm sitting in class burning holes into the back of kacchans head as I stare at him.

Nobody knows that Kacchan kissed me at the very back of the school this morning.

Nobody knows what Kacchans' mouth tastes like, or how that one wrinkle in his brow vanishes when he relaxes his face.

For the 5 seconds that Kacchan kissed me with enough force to snatch my soul, his face was totally relaxed. No scowling, maybe he huffed a little. I don't remember.

My brain is absolutely spinning in circles right now. Does this mean Kacchan likes me??
Did he always like me?? Was this just a spur-of-the-moment?
Is he gonna totally regret sharing what was probably his first kiss with his childhood friend? I bet he's thinking of ways to kill me so I never tell anyone this…

But… I really hope he kisses me again soon.

“Midoriya!” The teacher's voice shouted

“Wh..huh!?” I gasped, looking up quickly.

The class snickered and laughed at me suddenly.. uhoh..

“S..sorry.. what was the question..?” I muttered.

“You obviously aren't paying attention. Don't make me have a talk with the counselor about your lack of participation again.” He said sharply.

“Y..yes sir…” I whined… Kacchans eyes were trained on me, his expression unreadable as he slowly looked away.

How embarrassing..

--

The day dragged on for what felt like ages. Kacchan barely spoke to me at all today… I really hope he's not mad..

I nervously packed my bag and was about to walk out alone before I felt a hand on my shoulder stop me.

“Oi, walk with me.” Kacchan said to me, I turned my head quickly, nearly giving myself whiplash as I gawked at him.

“K-kacchan.. okay sure..” I said, hoping my face wasn't as red as I felt it was.

Kacchan's hand pushed me along, outside the school, and way far down the street before he finally let me go..

We walked in total silence for what felt like forever before Kacchan said something

“Instead of writing your shitty little stories, come to me instead.” He huffed, not looking at me, his expression curt.

“I..i'm not sure what you mean..” I said.

He scoffed. I could see his ears getting red. Was he embarrassed?

“I meant that if you're so damn desperate for my attention, talk to me. It's super creepy thinking about the fact that you write love stories about me.”

“Oh… okay kacchan.. I will..” I said.. we walked a little longer..

I wonder if…he would let me hold his hand…

I felt my fingers twitch eagerly at my side, a buzzing warmth in my hand. My body is urging me to just do it.

Awkwardly, I stuck my hand out to graze against Kacchan's fingers-- and with a swift move, he was grabbing my hand in his, and gripping me almost painfully

“Stop being weird and just fucking ask.” He huffed

“Y-yes..” i winced in pain. Man, Kacchans ' grip was intense..

But.. i wonder if this means.. that Kacchan and i are dating..

Well, even if it doesn't.

At least for now, I'm the only person in the world who knows how Kacchan kisses.

Notes:

Thank you sm for reading pls feel free to read my other fanfictions!!!!