(This one's mostly fluff, I'm starting to like it way too much)
(By fluff I mean like- spicy fluff. I can't think of a better term)
"GON WINS!" he jumped slightly, causing the few people who sat around him (pretty much the dekusquad and mina) to glance at him curiously. Killua had never been bothered by noise before like that, and it wasn't even that loud. Killua closed his eyes and took a deep breath, before turning in the direction that Gon would come from with a neutral expression. "Killua! Killua!" as soon as he saw Gon's bright eager smile his neutral expression crashed, a small blush forming. Why's he so excited? I mean I am too, but he's acting like he can't wait another minute! Gon leapt upwards as he got near and Killua caught him, he wrapped his arms around his neck with a giggle.
Gon shifted and grabbed his bag, which only made Killua more nervous. Why does he need his bag? He pushed down all the options and decided to pet Gon's hair. "cementoss said it would take 25 minutes to repair the stage" he looked up and licked his lips a little. GET YOUR SHIT TOGETHER KILLUA! "shouldn't you guys go to the waiting room? You know, to get ready?" Killua locked eyes with mina, who had a sly look on her face. Was it that obvious that we're dating already? He felt his face grow slightly more red at the look on her face. Gon was beaming again, this time directly in his face. "let's go Killua!" he sighed, then set Gon down. He frowned but grabbed his arm, Killua tried to pull away but he held on tight. What happened to not acting like a couple in public.
Gon was so excited! While Killua was fighting, this strange little purple guy with balls on his head showed him a book with mostly pictures. Gon had seen that the people in the book kissed a lot and for a long time. Just like me and Killua! He had thought. He noticed that there was this thing where they both held a chocolate thing called a 'pockey' in their mouth and slowly moved forward until they kissed. Killua liked chocolate so it was perfect! Before he could read more the pink girl with yellow horns looked at the book and smacked the short guy in the face with it. She said that he shouldn't spend time with him but Gon couldn't help but feel sad that he couldn't learn more. Gon had asked about the pokeys and the girl explained what they were and he had bought some pokeys from a nearby stand and put them in his bag.
He was so excited he nearly forgot to lock the door behind him. Don't want a repeat of what happened the first time. He dropped the backpack and Killua went in first, going easy. But I don't like it easy! Easy is boring! He knew that Killua was only going easy so Gon could decide how he wanted it. He's so sweet when he wants to be. Killua was kind of tall, so he grabbed his shoulders and pulled him down a bit so he could get a better kiss. Instead of coming down, Killua put one hand under each of his legs and lifted him up. Hah! Now I'm taller than you! Gon tilted his head down and sideways to deepen the kiss, opening his mouth for Killua to enter. He honestly didn't know why, but he liked it when Killua was being a little aggressive. Is that weird? He pushed down his doubts and enjoyed it.
Killua decided to make the first move instead of letting Gon use anything from his bag. Honestly, it was probably something innocent like candy or some sort of cute accessory but he was only 85% sure. He felt Gon try to get him down but if that had anything to do with his plan, he would try to avoid it until he gained more confidence. Killua lifted him up by the legs and wasn't surprised when Gon tried to get more again. He let his tongue in, trying not to go too hard on him. He felt Gon's hands trace up from his shoulders to his cheeks, which he cupped with one hand while the other went to his hair again. Gon had always loved to touch his hair, but he seemed to be doing it a lot more ever since the confession. It wasn't like he minded but it just made him wonder.
Killua's arms wanted to do something else so he went over to the table and set Gon down on it gently, before running his hands up his legs and to his back. Gon had closed his eyes and put more pressure against him. Does he want me to do that too? Killua wasn't sure, he was still kind of nervous about this whole kissing thing. What if he did it wrong? What if he accidently hurt Gon? What if Killua went too aggressive and Gon wouldn't like him anymore? He was broken out of his worry when Gon pulled him sharply towards him. He couldn't help but let out a small squeak of surprise. Killua decided to go a bit harder and tilted his head a little in the opposite direction Gon did. He heard him let out a satisfied noise so he didn't add any more pressure.
Suddenly Gon broke the kiss and pushed Killua back a bit, panting hard. Killua was only slightly out of breath, but Gon could hold his breath for more than 5 minutes so he was kind of confused. Well, he's not underwater, did I go too far? "was it too much?" he worried, then Gon frowned a bit, catching his breath. "you keep doing it easy, I don't like easy!" he blinked in surprise. Really? Gon smiled brightly and Killua suppressed the urge to kiss him again before he got his breath back entirely. "I'm sorry, I'm just afraid I'll get aggressive if I don't hold back enough" Gon smacked him in the face and he couldn't hide his shocked expression.
"I like when you go aggressive!" oh, Well that explains a lot of things. "ok fine, but if you don't like something I do tell me to stop ok?" Gon nodded, "I will!" then Killua yanked Gon closer, forcefully pressing their mouths together. Gon parted his lips so Killua entered, wondering why he preferred that. Well, Gon wanted aggressive, so he's getting aggressive. But Killua was still worried about going too far, how much was enough? How much was too much? He decided to figure that out by acting, not worrying. Gon let out muffled moans as he kept up the pressure. Ok, I'll stay at this level for a few minutes. He checked the time, only 8 minutes have passed.
He moved his hands from Gon's upper back to the nape of his neck, his right hand resting there while the left moved back down to his lower back. At the same time Gon's hands were moving too, they went from against his own sides, up his legs and onto his hips causing Killua to blush slightly. Gon pulled back slightly so Killua stopped, letting him breathe. As he did so one of Gon's hands trailed up his back and pressed firmly. He got the message and pulled Gon a little closer, placing a soft kiss on his neck. He did it a few times, each time putting a little more pressure than the last. "Ahmh~ Mmh~" he enjoyed the noises for a few moments before biting down a little. That's not too aggressive right?
1264 words
To be continued...
small cliffhanger because the chapter got too long for my liking. (if i didn't split it it would have been like 3000 words or something)

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Assassins X Heroes (HxH X BNHA)
FanfictionThe first thing Killua felt was pain. It laced through his back and shoulders. The second thing he felt was rain as it pelted down on his face. Suddenly there was a bright light shining through his eyelids. "the hell? Is he dead?" Killua groaned, op...