It had been a total accident. He hadn't meant for it to happen, and for some reason it felt weird. Gon froze up, his breath catching in his chest. He was suddenly weak in the knees, but why?

The wrestling match took pause, and Killua glanced up at him with a questioning look. They only had one room and one bed in Heaven's Arena, and with two of them in one cramped space things tended to get hyper and wound up before bed.

This wrestling match hadn't stood out from any of the others, the two of them had just been messing around on the bed in their nightly argument over who got the good pillow. But this time something different happened, leading to Gon freezing up and Killua immediately following suit.

Killua was laying back on his elbows, pushed to the defensive for the time being. Gon had leapt at his rare chance to take the lead, of course, but what had stopped him was Killua's knee. The silver haired assassin had lifted his knees up in front of him as a gate to keep Gon from wrapping him up in a hold, but his defenses had been raised a hair too late.

Gon could have pushed through, gotten his arm around Killua's neck, and won for the first time in two weeks, but when he'd doven forward to secure his victory the front of his pants had brushed against Killua's outstretched knee, and that's when it felt weird.

Which brings us to the present, with Killua quirking a brow and quickly picking up on what made Gon stop. The assassin blinked, the entire pause having lasted a mere second, and smirked when he caught onto the move that had allowed him to hold off Gon's inevitable victory. He smugly pressed his knee forward, meaning to push Gon back a little bit further.

Gon gasped again, startling. There it was again, that weird feeling.

Killua cocked his head to one side. What was this about? "What, Gon?" he asked, curious as to why the raven had suddenly started acting so strangely.

"It felt weird," Gon responded without hesitation, brows drawing together. He glanced down at his groin, which was still leaning against Killua's outstretched knee. It didn't feel weird now, so what had that been about?

"What felt weird?" Killua prompted.

"When you pushed your knee forward."

Killua blinked again, confused. "Why?"

"I dunno," Gon said slowly, almost pouting. The gears were visibly turning in his mind, he didn't like this not knowing. He'd been about to beat Killua in wrestling! So why had his belly felt all weird and prevented him from securing his long sought-after victory?

"Did it hurt?" Killua asked, concerned that he'd accidentally nailed his friend in the balls.

"No," Gon pondered, eyes still trained on Killua's knee. Something about sitting here leaning against Killua's knee was making him wanna press forward again… but wouldn't that make the weird feeling come back? Hm… Always one to follow his impulses without concern (and also determined to investigate this strange feeling), Gon pressed against Killua's knee again.

The feeling returned again, but this time Gon was prepared for it. He gazed down, fascinated but also confused by what this was. What was this feeling? And why did he wanna do it again?

"Why'd you do it again?" Killua snorted, having half a mind to end this odd exchange and swipe Gon's victory from under his nose.

"It feels kinda good," Gon thought out loud.

Killua blinked once again, now invested in whatever it was Gon was trying to figure out.

Driven by a mixture of determination and curiosity, Gon pushed his hips forward. Killua's knee pressed up against his groin, and that weird feeling came back again. It felt kinda warm, but tingly at the same time. It wasn't a bad feeling, and Gon was trying to figure out if it was a good feeling.

Killua watched quizzically as Gon cocked his head to one side, and then experimentally slid his hips up and down against Killua's knee. Gon's breath caught again, because suddenly the feeling got a whole lot stronger. Rubbing against Killua's knee instead of pushing against it made the feeling hotter.

It felt good.

Killua watched with a growing realization as Gon worked against his knee. The assassin's stomach gave a little quiver, and heat crawled to his cheeks when he figured it out. Did Gon seriously not know?

"Hey, Gon," Killua breathed, his lower belly starting to warm from watching Gon do that stuff against his knee. "What are you doing?" Killua knew what he was doing, but he wanted to see if Gon knew what he was doing.

"I dunno, but it's getting hotter," he said, eyes trained on where his hips connected with Killua's leg. "Killua, you try–"

Killua wasn't sure how he would have responded if Gon had finished that sentence, and he wasn't sure if he was disappointed or relieved when his words cut off. But there wasn't any time to dissect the ping pong game of Killua's thoughts, because there was a new development in Gon's pursuit of his newfound "mystery feeling."

"It got harder," Gon said, dumbfounded. He stopped his motion, kneeling up against Killua's leg and staring in confusion at his shorts. He woke up in the morning sometimes and his dick would be hard, but it always went away after he went to the bathroom. He'd never thought anything of it, but why was it standing up now? Gon didn't have to go to the bathroom, and it wasn't morning either.

Killua's mouth dried out and his eyes blew wide. Gon had gotten a little hard, and Killua could feel it against his skin through the thin fabric of Gon's overworn shorts.

"Why'd that happen?" Gon wondered aloud.

Killua blinked, astonished, up at his friend. Did he seriously not know what this was?!

Eyebrows drawn together, Gon tentatively moved against Killua's leg again. His breath hitched in his throat, the feeling had gotten hotter again.

"Hey, Killua, you try it," Gon suggested.

The silver haired boy sputtered, just about jumping out of his skin. "What?"

"It feels all hot," Gon breathed, his eyes getting a strange light to them, "But in a good way. I wanna show you!"

Killua's jaw dropped, but no words came out. Should he tell him? He should probably tell him–

Should Killua tell Gon that he was already (very) familiar with that "heat?" Or should he stay quiet and pretend that he was just figuring this out right now as well? Would Gon think he was weird for knowing what all this was, or would he praise Killua like he did when he showed off his fighting skills?

Killua's head was getting all fuzzy and hot thinking about showing Gon how to jerk himself off, but it was also getting so fuzzy and hot that he couldn't think straight. Nope, there was no way he was brave enough for that. He didn't think he couldn't do it– Well, he didn't not wanna do it, but was it wrong if Killua knew what was happening and Gon didn't?

"Here," Gon said. He changed his position, crawling between Killua's legs and kneeling over him on all fours. Gon leaned his elbow down beside Killua's head, and then put his knee in between Killua's legs.

The assassin gasped, his face flushing bright red. Gon was so close–

Killua's belly had been hot ever since he'd caught onto what Gon was doing and feeling, but when Gon pressed his knee against Killua's groin and replicated what he'd been doing to himself, that warm feeling quickly sparked into a pool of molten heat. Killua gasped, his back going rigid and his fingers digging into the sheets.

"Do you feel it?" Gon asked, his voice right at Killua's ear.

"Yeah," the silver haired boy answered shortly. No, he decided, he couldn't say anything. He wasn't brave enough. Not to mention the fact that he couldn't even imagine swapping their positions and taking this role for Gon instead. He was far too insecure for something like that… Killua lacked Gon's shamelessness, sparked by ignorance as it was.

"Isn't it weird?" Gon asked.

"Yeah," Killua breathed.

"I think it's… coming from my dick."

Killua wasn't sure how to respond to that. He was also too distracted.

"Hey," Gon exclaimed suddenly, "You got all hard too!"

Killua winced. Yes, he had. Gon just didn't know that he was a part of the reason and not just his leg.

"Does the feeling get hotter when it's hard for you too?" Gon asked.

"Yeah," Killua sputtered.

Gon went quiet, not stopping the motion on his knee, but biting his lip. "I kinda wanna… feel it at the same time as you."

Killua's heart raced in his chest.

Still chasing his curiosity, Gon moved again. He positioned himself in between Killua's knees, and tentatively held himself up on his elbows directly over Killua. He gazed down at the assassin, whose pale face was flushed and blue eyes wide.

"Is this… okay?" Gon asked, his eyes searching Killua's. Though the assassin didn't know what for.

"What do you mean?" Killua asked back, swallowing his spit.

"It just seems…" Gon trailed off, a faint color starting to crawl to his cheeks as he gazed down at Killua.

"Uh, yeah," Killua said, words fumbling. "It's normal. We're.. friends, right? So… it's okay."

Gon blinked, his eyes sparking with that glittering light that stole Killua's breath away. "Okay," he breathed, though the flush began to grow in prominence.

That made sense. Killua was Gon's best friend, so that was definitely why he wanted to feel it at the same time. His face was turning red because the feeling was spreading to his face… probably.

Gon slowly laid down on top of Killua. His tented shorts lined up against Killua's, and his breathing got a little uneven. This feeling was so… steamy. For some reason knowing that Killua was feeling the same thing made Gon's stomach do a weird flip. So many weird feelings tonight.

If rubbing himself against Killua's knee made him feel good, then if he rubbed against Killua then they both would feel good. Gon tested his theory, and slid his hips up and down against Killua's.

The silver haired boy gasped, and Gon knew that his guess had been right. He kept going, wanting to keep feeling that feeling. Gon felt himself get harder as he continued, and soon a sweat broke against his brow. He clenched his fists, bracing his knees on either side of Killua's as he focused on keeping the friction going.

It felt so good, and hearing Killua panting in his ear was making it feel even better.

Suddenly, the heat felt a little crazy, and Gon clenched his teeth. He pressed harder against Killua, and moved faster. Gon buried his face into the sheets next to Killua's neck, his belly felt really tense. The feeling was getting stronger than ever, and Gon felt like he had to keep it going cause something was about to give. Killua squirmed a little under him, and Gon knew that he was feeling the exact same thing.

It felt like Gon had pulled himself to the top of a hill, and he gasped when the feeling got better and hotter than ever before. But then, right when it was perfect, something snapped in Gon's groin, and it felt like the entire hill shattered beneath him. Gon squeaked when he felt something wet come out of him, and he collapsed slack against Killua with a gasp.

Gon lay there for a little bit, blinking as the hot feeling slowly faded away, like it had never been there in the first place. Killua was in a similar state beneath him, and Gon was lifted up and down with each of his friend's drawn breaths. The feeling was gone, but now laying on top of Killua like this was causing a sort of tickle in his chest…

The raven rolled off of Killua, and sat up in the bed to inspect his shorts. He frowned in discomfort when that slimy stuff moved against him in his underwear. "Why's it wet?" he asked, taking a peek at Killua's shorts to see if he was having the same problem.

The assassin sat up, only meeting Gon's gaze for a second at a time before looking away and then looking back. His cheeks were still red. "Uh, it means you're finished."

"Finished?" Gon asked, confused.

"The feeling's all done," Killua reiterated.

"Ohh," Gon said, immediately taking Killua's word as fact even though there was no further explanation given.

"I'm gonna change my shorts," Killua mumbled, rolling off the bed and padding over to his backpack.

"Me too!" Gon announced, following suit. He darted over to his backpack, wincing as the slimy stuff started to drip down the inside of his leg. When he changed his shorts and underwear, he found some creamy looking liquid down there. Wrinkling his nose, Gon balled his dirtied clothes up and tossed them into the dirty-pile in the corner of the room.

The feeling was gone… but there was still this sort of prickling in Gon's chest. Once again following his impulses, Gon peeked over his shoulder to where Killua was changing into his pajama shirt.

Looking at and thinking about Killua was making Gon's chest feel kinda fuzzy… huh.

Gon changed into his pajamas just like Killua, and joined his friend in the bed. They slipped under the covers, and Gon didn't argue when Killua took the good pillow. The raven reached over to turn the lamp off, leaving the two of them in the dark with only the dim lights from the surrounding city cutting through the pitch black of the bedroom.

Lying on his back and gazing up at the ceiling, Gon thought about that feeling. It had felt kinda… different, laying on Killua like that. Now that he was back to laying beside him like they always did, he kinda wanted to scoot closer.

"Hey, Killua, can we do that again tomorrow night?" Gon asked the second the thought crossed his mind. "It was kinda fun."

"Uh– sure," the assassin sputtered. Gon could hear him hiding his head under the blankets.

Gon smiled, the thought that he'd get to do that again the next time they wrestled made him feel kind of excited. He was glad he'd discovered this weird feeling, and was glad he'd gotten to share it with Killua! This fuzzy feeling in his chest must just be some sort of side effect…