Thread by @RockerKikiDoods

#SpellboundBKDK #bkdk
Day One Prompt: Potions

-x-
Katsuki should have listened to Eijirou when he said not to leave the common room, but that would have only stopped Denki and Hanta from getting to him. It would have done nothing to stop Mina.

She was bouncing around like someone had cast springs on the bottom of her feet as her eyes shone brightly.

“Kat! I need you to come look at something!”

The blonde skillfully moved his arm around, keeping her from grabbing the wrist she was reaching for. “What the

hell is it now, Pinky?”

“I need you to see if I brewed this potion correctly?”

A grumble escaped him as he let the scroll with his Charms homework curl into itself while standing, “What did you try to make this time?”

She managed to get ahold of his wrist, pulling him forward as he stood, “You’ll have to come see.”

Eijirou could only sigh as he followed the pair toward the moving staircases.

~x~

Why did he have to be the one that ended up the preferred test subject for these stupid ideas? Then Katsuki reminded himself of exactly who he hung out with as three of the idiot brigade danced around the simmering cauldron.

He grunted, “And why are we in this old bathroom?”

“Because I needed somewhere private for my masterpiece!”

Eijirou sighed at the still bouncing girl, “You’re starting to sound like Mei there, Mina.”

Denki slid up beside her, throwing an arm around her shoulders, “And Mei is a genius so that is a compliment.”

“Yeah,” Hanata chimed in, “let our girl have her moment.”

Eijirou held back his internal desire to growl at the ‘our girl’ comment, but Katsuki was not as innately polite.

Ignoring the stupid direction the conversation was taking, he growled “But that still doesn’t tell me what you brewed, Pinky?”

“Polyjuice Potion!”

Katsuki’s level of shock and amazement was easily on par with the girl’s excitement and pride. He was not

expecting her to have been able to focus on the potion for that long, but it was also considered forbidden. And though people always deemed the blonde a bad egg because of a lack in volume control, he was a fairly straight-laced student.

“And what made you want to make that?”

Mina shrugged, “Thought it would be fun.”
That was definitely not the kind of answer he was looking for, but he had a more glaring one pop to the front of his mind.

“How the hell am I supposed to see if you brewed it right?”

It was in that moment, he should have run.

“By trying it!”

~x~

The plan wasn’t terrible. Denki and Hanta would transform into each other, while Katsuki and Eijirou did the same. Then they could head back to their respective dorms until the transformation wore off.

“You imbeciles can do it on your own,” Katsuki turned away from the offered goblet. There were plenty of ways this could go wrong and the blonde wasn’t in the mood to be on the receiving end of any of it.

“I didn’t think you would be the one to chicken out on us.”

“Yeah, man. Since when were you scared of anything?”

Denki and Hanata knew exactly what they were doing to the point it almost seemed like they had those lines prepared in advance.

Katsuki’s shoulders tensed. He was loud and maybe a little too prideful for his own good, especially now. He spun on his heels, snatching the goblet from Mina’s outstretched hand.

“I don’t get why you idiots need me for everything you do.”

Mina smiled, “Because you’re the best, Kat.”

~x~

How the hell did those idiots manage to put the wrong red hair in his goblet of potion? Katsuki knew he should have plucked the hair right from Eijirou’s head, but instead he had trusted the goof pair.

And they hadn’t stuck around to help him out once they realized their mistake as his hair had changed into two colors instead of one.

‘Why did it have to be Half ‘n Half?’

Thankfully, he had been able to move up to the fifth floor without running into anyone else. Katsuki would have just stayed hiding in that bathroom for the remainder of the hour, but a part of him suspected that his current situation hadn’t fully been by accident.

“Stupid idiots…” he grumbled as he lazily perused the mounds of things that had been left in the Room of Requirement over the centuries.

He hated to admit it, but it was sort of nice to just sift through the old memories that everyone but the castle had forgotten.

Maybe those idiots had done him a favor.

Somewhere behind him, Katsuki heard the clicking of a large door opening and latching back. A faint voice trickled around the stuff, being gently distorted by its own echo. He couldn’t make out who it was, until the person continued talking to themself as they grew closer.

“...Tsu said I should get it over with, like ripping off a bandaid, but she doesn’t know what this feels like. I get that it’s a simple question and it will likely come with a yes or no answer, and she gets that but she doesn’t get

that things will change regardless of what he answers. It could be amazing, but it could also ruin everything.”

Katsuki’s heart had enough time to skip when he recognized that voice, before its owner rounded a corner, ending up in the same aisleway he had been stopped in.

“Shoto!” Izuku squeaked the moment he realized that he wasn’t alone; the force of his own sound effect seemed to lift him a few inches off the ground.

He didn’t even give himself a full breath to calm his nerves before going a mile a minute again, “I’m so sorry,

I didn’t think anyone else was in here. I hope I wasn’t interrupting anything, I was just hoping to get away for a bit to do some thinking, but if you were trying to do to something similar that I can go-”

The freckled-boy was cut off as his friend grabbed his shoulders.

“It’s fine, Izuku.”

The words sounded weird as Katsuki spoke with someone else’s voice, but he was also slightly grateful that the potion changed his voice on its own. Especially when he watched the nerd pause to take a deep breath on his own.

“Sorry, I wasn’t trying to ramble on…” Izuku’s voice trailed off.

“It didn’t hurt anything.” Katsuki thought hard about how the boy he was impersonating would respond, making sure to keep his expression as neutral as possible. “Is something the matter?”

A defeated sigh escaped him, “I don’t want to bother you.”

“It isn’t a bother. You’re my friend.” Those words stung a little. Katsuki was sure that Izuku still considered them friends, but he constantly wondered why. He had been

such an ass to him throughout their first year, and even though they had gotten over that years ago, he never forgot. He also couldn’t help but wish that Izuku would come to him with his problems like this, like he would before they both got those invitations to Hogwarts.

“...okay…” Izuku’s meek response pulled him back into their conversation, but it seemed that the green-haired boy was also deep in his thoughts.

And that fact remained for at least a minute as he seemed to get his thoughts together, Katsuki remaining quiet as Shoto would have.

“It’s the winter formal…”

Katsuki couldn’t help, but raise a brow at the statement. That was most definitely not what he thought the nerd was half into a panic attack over.

“I want to ask him to go with me, like as a date, but I don’t want to risk losing everything we have now.”

The gears in Katsuki’s head started whirling at a hundred miles an hour: the nerd had a crush on someone! And he didn’t have the slightest clue who it could be!

From the statement, he knew that it was a guy, but that didn’t help. His first guess would have been Half ‘n Half, but that obviously wasn’t right with Izuku asking who he thought he was asking for advice. Going over the other guys in the nerd’s housemates and closer friend

circle, he had four other options.

There were three other boys in Slytherin that were the same year as them and the usual blonde severely hoped that neither Minoru or Yuga were the one that had Izuku so torn up. The other option was Tenya, who was also a

part of Izuku’s inner circle, but Katsuki wasn’t set on him either.

Even if the freckled-boy got along with Tenya, Katsuki couldn’t see the two of them together for anything. He was also pretty sure that Glasses had a thing for that weird tinkerer in Ravenclaw.

That left only one other option: Hitoshi.
He had never noticed anything special in the nerd’s interactions with the droopy-eyed Hufflepuff, but maybe that was the point. Maybe Izuku kept things painfully normal so that the other boy wouldn’t figure out that he

had feelings for him. And Katsuki had only had a handful of what could be considered ‘conversations’ with Hitoshi, so he couldn’t really decide what he thought his reaction to the nerd’s confession might be.

But that was definitely something Shoto would be able to help him with. Katsuki knew that Half ‘n Half and Droopy got along quite well from what he had heard from Denki and Hanta, especially since they were in the same house.

“...I mean…,” Izuku had apparently already started even if the other had been too absorbed in his own deductions.
Katsuki mental cursed himself, hoping that he hadn’t missed the very answer he had been trying to figure out.

“...do you think I would ruin everything? Would Kacchan want nothing to do with me anymore?”

A warm tingling feeling coursed through Katsuki’s body. There was no way Izuku could be talking about him…right?

“It just feels like everything is going back to the way it used to be when we were kids and I don’t want to drive him away again.” Those emerald eyes shone from the tears that were trying to form, but Izuku wouldn’t let them fall, “I want him to be happy and I doubt that his

happily ever after would ever include me, but it hurts when I try to imagine anyone else beside him that way.”

Katsuki’s heart thumped wildly in his chest, that tingling sensation only growing stronger. Izuku was talking about him. He was the one that the nerd wanted to confess to.

In that moment, the usual blonde thought nothing of the potion mishap he was experiencing, unable to hold back as those first few tears of anxiety slipped past Izuku’s lashes. His arms wrapped around the smaller boy, earning him a squeak at the sudden hug, but he cut the

sound of himself by slamming his lips (or rather Shoto’s lips) into Izuku’s.
The tingling grew stronger as those emerald eyes grew wider. At first, he was shocked that his friend was kissing him, but then everything shifted. Or rather, he watched Shoto shift into Katsuki.

Stepping back to process what he had just done, the blonde was met with confusion and wonder, but also hope. His heart broke as he remembered that he wasn’t himself.
“K-Kacchan?”

Katsuki quickly turned, looking for any reflective surface in hopes that he had kissed the nerd as himself and not someone else. As his crimson eyes peered back at him from an old silver plate, he immediately rounded back to the other boy.

“B-But how?” Izuku’s mind was trying to piece everything together so quickly, Katsuki could practically imagine those cogs popping loose and getting stuck. “I w-was talking to Sho-hmph!”

He was cut off as soft and warm lips covered his again.

With a little more control over his own emotions, Katsuki only lingered a moment this time. But the effect was much more powerful for both of them, because there was no question over what had happened.

“It’s a long ass story, nerd.” The blonde found himself slightly out of breath anyway. Trying and failing to calm his nerves as rubies and emeralds met, “But I can say that all the hassle wasn’t for nothing.”

“Then…” Izuku couldn’t bring himself to say the words, even though he knew that the other boy knew his big secret now.

“Yes, Izuku,” Katsuki reached forward to take one of his hands in his, “I will go to that winter formal with you.”

Those idiots had really done him a favor after all.

~x~

Bonus: Mina and Ochako waited patiently around the corner from the entrance to Ravenclaw Tower. The money from them and their friends stuffed in their pockets. Their planning and Momo’s fee was well worth finally getting those pinning idiots together.

[THE END]

Thank you so much for reading! Hope you all enjoyed!

@AmorExOculis (forgot it at the top 😭)