#BKDK Younger Katsuki slowly falling for older Izuku through the years.

The first time they met, all Katsuki could think was ‘what a loser.’ At the age of four, the little boy having just gotten his quirk, Katsuki laughed at the quirkless almost teen. Pathetic Katsuki found -

him. With his dumb bright smile, his soft green curls, and his cute little freckles. And this boy was supposed to be his superior?

What made Deku, the name Katsuki had given him, suck a little less, was that Izuku was quite nice. Or better yet, Izuku tended to throw around -

compliments as if they were candy. Fuelling Katsuki’s ego, building it up until it had nowhere to crash down.

“Did you see that explosion, Deku?”

“Yes, I did, Kacchan! You’re so amazing! You’ll be the best hero out there.”

The nickname Izuku had given him in return, was -

something Katsuki got a little miffed about. But why would he complain if there were so many good words in those sentences? Katsuki sucked up the praises like a sponge, loving how it made his heart race every time Izuku spoke.

Katsuki’s friends liked it when Izuku hung out -

with them, because he was older than them. Five years their senior. Which made him cool by default. At least in the eyes of children.

Not that Katsuki agreed. He liked it better when Izuku countered the extras with presentations on how wonderful Katsuki was.

“No, Kacchan is -

much better than me. Have you seen how strong he’s getting? His explosions are really big now.”

Katsuki was less of a fan of Izuku’s compliments towards the extras. Those stupid wings won’t get you very far, and who wants to lengthen their limbs anyway? That’s just creepy. -

Izuku’s praises should just remain their focus on Katsuki, and Katsuki alone. Fuck the others.

Once Izuku went to middle school, Katsuki saw less and less of his very own fanboy as he liked to call Deku. He would never admit it, but Katsuki missed the warm fuzzy feeling Izuku -

brought him whenever they spoke. Missed the way Izuku’s eyes glittered when he looked at Katsuki. Missed the smile Izuku wore when Katsuki spoke of what he had accomplished.

For some reason Izuku had gotten quite special, even if he was still a quirkless good-for-nothing. -

The only thing that did have Izuku come running, was when Katsuki needed help. Which was never. Or maybe once or twice. But only because he was trying to work ahead, and didn’t feel like spending extra time on it. It was easier when Izuku explained it all for him, and then he -

could just write it down. Other than that Katsuki would never ask for help. Especially not from a Deku.

Katsuki would do anything to get into UA, so doing extra homework did help a lot. It had been his dream ever since he developed his quirk, and Izuku said that he was -

amazing. At that point he realised, or was more told by Izuku, that he could achieve great things if he went to the same high school as All Might. So that was what Katsuki would be fighting for. As if they would not accept him once he was old enough.

It came as a shock when -

Izuku’s frail body suddenly started bulking up. Katsuki saw him even less by then, the last year of middle school really sucking up all his time. But it seemed he had a new hobby, which was working out. That thin body was gaining muscles, fast. Katsuki watched with amazement as -

Izuku started to grow. Hated how much bigger he suddenly looked.

Katsuki was supposed to be the bigger one.

And then, out of nowhere, Izuku announced that he got into UA and in the meantime had developed a quirk as well. -

It was preposterous.

Katsuki was angry. Really angry.

How dare Izuku get into UA first and develop some weird powerful quirk no one had ever heard of? How dare he take Katsuki’s dream and make it his own. Katsuki was supposed to be there! He was supposed to be the one in -

the spotlight, showing everyone how great he was. What a great hero he could be. Izuku had told him so himself.

And Katsuki had told Izuku so.

Screaming and calling Izuku names for taking his spot. Crying in his arms, because it all wasn’t fair. And Izuku held him. -

Let the ten-year-old weep away his sorrows as Katsuki buried his face in the crook of Izuku’s neck.

The other was always so warm.

Izuku told him that everything would be alright. Izuku was just getting a head start, but Katsuki would catch up in no time. And then they’d be -

heroes together.

Izuku always knew exactly what to say.

All this Katsuki took by heart. Because it was a nice image. Katsuki would still fight for the number one position, but seeing Izuku at second. That would be a sight to behold. -

Have Izuku so close, still fawning over him. Being almost as good as Katsuki.

He could make it, Katsuki was sure of it. Otherwise Katsuki wouldn’t keep him around.

TBC

With Izuku at UA, Katsuki barely saw him. It got even worse when they introduced dorms at the high school, effectively pulling Izuku away from the neighbourhood. Only once or twice a month would the teen come visit his mother, and if Katsuki was lucky, he’d also come -

visit Katsuki.

Which was not enough.

Katsuki tried to remain the bigger man. Pretend it was alright that Izuku was not around as much. But in truth… He hated it. Hated that Izuku was growing, moving away from him at a pace Katsuki could never catch up to. Everything about -

him was getting stronger, faster, better. He was getting a lot of friends his own age, whom he spent all his time with. Even when he was around Katsuki, he’d be texting them, dumbly smiling at his phone.

How often Katsuki hadn’t accused him of being an addict, and how stupid -

he looked when busy on his phone.

Izuku never seemed to care though. Just laughed at Katsuki’s remarks and then pulled the boy in for a hug. Katsuki would always let Izuku hug him. Relish in his warmth as he absorbed Izuku’s sweet words whispered to him in his ear.

His heart -

would always skip a beat when Izuku told him he had missed Katsuki.

But there time together was always short-lived. Katsuki didn’t get to show off his explosions as much as he wished he could. Didn’t have Izuku around to help him with his homework anymore. And even as he -

was finally getting the hang of middle school, gathering a nice group of fanboys around him, Izuku was getting ready to graduate.

The years moved too fast. Katsuki continued to wish for him to finally catch up to Izuku. Be just as old as the weak quirkless boy. But somehow -

he never got there. Izuku was always three steps ahead, showing Katsuki his back as he moved forward. Standing in the shadow of their favourite hero, All Might. Izuku had met the hero. Had learned from the hero. Katsuki could only listen in awe to the stories Izuku would tell. -

Cling to his lips as he sketched marvellous scenes Katsuki wished he was a part of.

When Izuku graduated, he stayed at his mom’s place for a few days. Catching up on times apart. Enjoying each other’s company before Izuku set out into the real world. No safety nets left of UA.-

Izuku was on his own.

It was then that Katsuki threw a fit at his own home, demanding that he could stay over at the Midoriyas’. He screamed and cried, and his mother accused him of being a baby and a brat, not acting his age at all. But Katsuki had lost all sense at -

that point. Knew this would be one of the last times Izuku would hang out with him as two teens, and not as a teen and an adult. Even if Izuku would never see Katsuki as less, Katsuki did feel inferior at that point. Was well aware of how much of a preteen he was.

Especially -

when Izuku paid him no mind when he undressed right in front of Katsuki when they were getting ready for bed.

Puberty hit Katsuki hard right then. He became very aware of Izuku’s body. Of all the dips and curves. Of scars and muscles. Of bare skin that could flit under -

his fingers.

Katsuki counted it as a loss when Izuku decided to sleep on a mattress on the floor, and not join him on the bed where Izuku usually slept. At least Katsuki got to envelop himself with Izuku’s scent, burying his face in the soft pillow. -

And if he secretly rubbed himself under the sheets, then the world would never know.

TBC

After that Katsuki mostly saw Izuku on the flat screen of his TV. As a hero Izuku was doing amazing, fighting villain after villain, and then granting a smile that made Katsuki’s heart ache.

It was supposed to be reserved just for him. -

Another thing Katsuki was not too much of a fan of, was the fact that Izuku had taken the hero name ‘Deku,’ as if that didn’t belong to Katsuki. As if he hadn’t come up with the name to insult Izuku. And now the other wore it with pride. -

Katsuki wondered if Izuku thought of him when people called the hero. If the name reminded him of Katsuki. If he heard the name whispered in his ear, enticing all kinds of other feelings.

These thoughts mostly came to Katsuki in his bedroom, hidden away under his sheets. -

The older he got, the more Izuku invaded his imagination. Of course there was no place else he could turn to if he wanted to see Izuku. And with how tight his hero costume fitted on his body, Katsuki remembered how muscular he had gotten. -

That image of Izuku undressing was forever branded into his memory, ready to be called up during rather lonely nights.

Katsuki refused to acknowledge this was more than wishing Izuku was there to praise him again. -

When he was in his final year of middle school he aced the test to get into UA, just like Izuku had. Katsuki was proud and loved how everyone was celebrating his accomplishment. But the thing that had made him the happiest, was the text Izuku had sent him, -

congratulating him on his acceptance. He was over the moon to see those stupid emojis on his screen, Izuku clearly not aware on how to talk to people.

Katsuki made sure to keep the conversation going after that. Now that he had Izuku’s number, he could make contact easier. -

Could invite the other over. Could tell the nerd that he was going to do better and rise above him.

The fact that Izuku confirmed it all only made Katsuki’s eyes well up with tears.

He really wished Izuku was there right now, so that he could give him a kiss.

TBC

My patrons told me to update this one and the update has been out for five days over on there! And now it's here :D

-

UA was brutal. Izuku had warned him about how hard it would all be and how talented everyone was that got into the school. At first it seemed easy, -

the quirks of all the other extras not as amazing as Katsuki’s was.

But he knew not to underestimate anyone. Izuku had taught him that. One never knew what kind of quirk was lying up ahead.

And so Katsuki studied hard, and trained even harder. -

He made sure to get the best grades of his class, staying in the top three continuously.

The arrogance that dripped off him made him unlikeable. At least to the public. He learned that when his face appeared on the television during the sports festival. -

The messages on social media were not too great. Not that Katsuki cared. It didn’t matter. Not when someone else was there to pick him right back up.

It were Izuku’s praises on how great he had done that stood out. That Izuku had stayed home, -

just to watch Katsuki win all his matches. Come out on top and show everyone he was going to be the number one hero.

Hearing all these sweet words coming from Izuku, made Katsuki a bit cocky. Or cockier. He got bold. Took things a bit further. -

His sessions in the gym increased, working out on his physique as many times as he could, bulking up quite quickly under the ruse of needing to get stronger.

The fact that he took pictures of his shirtless sweaty torso right after one and sent it to Izuku, -

had no other meaning behind it than wanting to show of how hard he was working.

It also didn’t make Katsuki’s heart soar when Izuku complimented him on how his body was looking.

TBC

A big thank you to @sailor_deku who donated a Ko-Fi<3 Here's the update you requested! I hope you enjoy desperate little Kacchan

-

After sending that one picture of him shirtless and receiving quite the positive response, Katsuki sent many more. In varying stages of undress. -

Sometimes he still wore his white tank top, appearing see through due to all the sweat. And sometimes he only had a towel wrapped around his waist, riding so low his little landing strip of blond coarse hair peeked out above.

And never did Izuku stop praising him. -

Telling him how great it was that he was working so hard and that it was really showing.

Once Izuku even mentioned Katsuki’s six-pack looked better than Izuku’s. A compliment he sucked in deep, even if the memory of Izuku’s toned physique was branded into Katsuki’s brain. -

There was just one thing about all this that bothered Katsuki. All the compliments were quite general. Nothing in Izuku’s words implied anything beyond admiration.

Katsuki wanted to do more to Izuku than pull the same praises from his lips over and over again. -

It was aggravating how Izuku never seemed to acknowledge that perhaps Katsuki was not just working hard, but that he was also looking great. Better than great. Amazing.

That he could make panties drop left and right, -

though there was only one pair of underwear he needed to have lowered. This new craving had crawled under his skin, the longer the fed Izuku the pictures. Just once he needed Izuku to comment on his appearance and tell Katsuki that he was attractive. -

Because Katsuki couldn’t stand the fact that he found Izuku handsome, but the other may not feel the same.

The challenge had slipped in without Izuku ever realising. Katsuki was going to make Izuku see. -

Prove to him their age difference was nothing to think of, Katsuki as mature as Izuku was.

Taking a picture of the outline of his hard dick resting in his boxers, and sending it to Izuku, was perhaps not the most strategic move. At least it should’ve gotten the point across. -

Or so Katsuki expected.

Adding the question /want to help me out with this?/ should’ve really done the trick.

If Izuku hadn’t been so dense.

The reply Katsuki received was something he would never be able to live down. -

/Ah Kacchan. I think that is something you should discuss with your dad. He can explain to you what it means when you have an erection./

TBC

Thank you again, my dear! I hope you enjoyed!