Disclaimer: I don't own any of these characters, merely the plot and the circumstances I put them in. Harry Potter belongs to J.K Rowling and Katekyo Hitman Reborn belongs to Akira Amano.

Warnings: Slash (male/male pairings), AU for HP after GoF, violence, language, sexual situations, LEMON, hints/concepts of reincarnation, crack, etc.

Pairings: 18Harry (Hibari/Harry), Alaude/OC, minor 6927 (Mukuro/Tsuna), minor Yamamoto/Hermione, minor Bill/Dino, mentions of Neville/Luna, Cedric/OMC and past Cedric/Harry

Timeline/Ages: Past/Teenagers (16)

Cats Love Playtime

Hibari felt a bubble of annoyance lingering within his chest which was adding to his foul mood. Normally the Prefect would relish the type of day he had; catching delinquents and punishing them for disturbing the peace, punishing students who were breaking the rules, finishing his mountain of paperwork without trouble and even catching a nice nap on the roof. These were the essential components to making a skylark happy or at least content. But Hibari was angry because one important key had been missing; his koneko-chan.

He had not seen or heard from Harry all day; he didn't spot him at the gate nor did he find him in the halls and he hadn't even stopped by for lunch as he usually did. Hibari had gone as far as seeking out the herbivores and questioning his boyfriend's whereabouts. What he had been told only made him more irritated; apparently Remus had come out to meet the group when they stopped by to pick up Harry and told them that he was under the weather, but would be fine within the next day or two.

Now, Hibari wasn't exactly mad that Harry was sick. He understood life enough that you couldn't control such things, but he was pissed that the wizard hadn't bothered to inform him of the matter. Which was why Hibari was making his way toward his kitten's home; after all, he wanted to check up on him and he also had a few choice words for the other boy.

"I'll show him what happens when he disobeys me," Hibari thought.

It didn't take long to trek the familiar path to Harry's residence and it was even easier to scale the tree that stood in front of the house, slinking across the thick branch that conveniently lingered outside the teen wizard's open window. Hibari had done this a dozen times already although he usually snuck in later in the day when Harry tended to do homework. But either way, this wasn't a regular visit and so Hibari remained extra quiet wanting to really catch Harry off guard.

Slipping through the window, Hibari paused taking in the sight before him realizing the true reason behind Harry's absence. The raven haired boy wasn't sick considering he looked rather healthy and content curled up on his bed but he wasn't in his usual state. Hibari couldn't be more amused than he was at that moment, smirking as he took in the pair of sleek triangular ears drooping atop Harry's head and the twitching cat tail that was hanging over Harry's hip. It seemed like Hibari had named his boyfriend well.

Walking over, he crouched down next to Harry's bed and reached out tweaking one of the ears. Harry frowned in his sleep and whimpered attempting to pull away, but Hibari refused to let go. Rather he laid a kiss upon his kitten's cheek, moving along his face before finally leaning up to blow at the ear. It trembled a little showing Harry's discomfort at the treatment. Hibari chuckled deeply taking the tip gently between his lips and biting it lightly. Harry hissed jolting awake.

"Bloody hell! What are you doing you arse?" he screamed sitting up while Hibari grinned at him. It took a minute for Harry to realize who exactly was in his room and with a yell of embarrassment pulled the covers over his head shouting, "Get out Hibari!"

"No."

"Get out this instant you crazy skylark!"

"You really are my koneko-chan now aren't you?"

"Shut up!" Harry growled poking his face out to glare at his boyfriend. But Hibari didn't seem flustered in the least, still smirking. Leaning close, he nipped at Harry's lips, "Come out, I want to see you."

"Hell no! You're just going to mock me!" Harry protested hugging the covers around him tighter.

"But I like you like this. It's sexy," Hibari purred.

Harry flushed deeply and looked away shaking his head, "I said no."

"Don't make me force you."

"I'd like to see you try!" Harry immediately regretted those words when Hibari's eyes gleamed and he pounced, wrestling with the younger boy. The teen wizard fought his hardest, but sadly Hibari was still stronger than him physically which was why he found himself pinned to the bed glaring up at the Prefect who was grinning smugly.

"I love it when you're riled up," Hibari admitted.

"Because you have a fetish for fighting," Harry shot back.

Hibari shrugged and leaned down kissing the other boy, silencing him. Harry squirmed slightly but didn't endeavor to free himself. Distracting his kitten, Hibari reached up and tweaked one of the ears smirking faintly when Harry gasped allowing Hibari to slip his tongue into his mouth. Harry mewed in protest at the unwanted touching of his ears, but Hibari didn't care as he continued to scratch and toy with the appendage. It was all the more gratifying when Harry began to relax under his ministrations, purring and arching in unconscious enjoyment.

Pulling away from the kiss, Hibari leaned up and licked the other ear before sucking on it gently, occasionally nipping. Harry whined his cheeks flushing as he began to rub up against Hibari in a very cat like fashion. The Cloud Guardian growled pressing back down against his smaller boyfriend, a simmering fire stirring in him. Licking the ear, he rumbled, "You're so cute like this."

"H-Hibari," Harry purred, embarrassment fading away under the tide of teenage hormones.

Reaching down, Hibari slipped a hand under Harry's shirt pushing it up to revealing his stomach and chest. The Prefect leaned down placing sharp nips and wet kisses upon the smooth flesh, feeling satisfaction with the sharp inhales of breath he heard as he worshipped his boyfriend's body. Hibari had waited far too long for this he felt, he had been patient enough and now it was time to fully claim his kitten.

Harry quivered in pleasure as he felt Hibari work along his stomach again, his lips hot as a branding iron as they seared his flesh. The young savior wasn't a novice when it came to sexual situations; Cedric had been the first one to touch him intimately and Hibari had initiated sexual contact before.

But he was still a virgin and considering how well he knew his boyfriend, Harry was pretty sure Hibari was finally tired of waiting; he wanted to be Harry's first and only if he had any say in the matter. And while this should scare the life out of him, Harry wasn't too bothered; sure he was nervous, he was going to have sex for the first time. But he trusted Hibari to never hurt him or force him into anything he didn't agree with.

"Focus on me," Hibari ordered as he worked off Harry's boxers since shorts would have been uncomfortable with his tail.

"S-sorry."

"Hn," Hibari grunted busying himself with sucking harshly on Harry's hip, teasing his pet by halting his progress with his boxers. He could see the teen wizard's erection straining against the material, dark amusement curling in his stomach at the frustrated noises Harry was beginning to make. But Hibari still needed to punish his kitten for not informing him of his situation. So he ignored the desperate gasps and strangled pleas as he move to the other hip, leaving dark bruises in his wake.

Harry dug his claws into the sheets, tearing them as his ears pressed back. Hibari was so close, he could feel the heat of his skylark and it was driving him crazy! But the bastard was torturing him like he knew how and Harry couldn't do anything to alleviate himself. He expected it really since this was Hibari, but it didn't help his situation any. He gave a yowl of shock when his tail was firmly tugged, not enough to hurt but it still caught him off guard.

"Your thoughts were wandering again."

"P-Prat," Harry hissed.

"Hn, still so fiery even during this," Hibari smirked finally tugging his boyfriend's boxers away, "I'm glad."

Harry blushed, "S-Shut up."

"Now you're talking too much. I want to hear your moans again," Hibari purred seductively before running his tongue up the length of the wizard's erection. Harry gasped loudly and let out a keen mewl as he arched. Pleasure sparked though his body as stars flashed before his eyes, his nerves on fire as Hibari's tongue toyed with him. He couldn't even speak coherently, all he wanted was that sizzling pleasure. And Harry begged, he moaned and pleaded as he gripped the Cloud Guardian's hair, drunk and dizzy on the sensations assaulting him.

Hibari was completely turned on as he listened to his kitten beg prettily with that sweet mouth of his. It was making it hard for him to concentrate on the task at hand since all he could envision was burying himself in the other boy and making him scream as he claimed him. Hibari felt a shudder crawl down his spine and gave Harry a sharp suck, his eyes focused on the teen wizard. Harry moaned again, green eyes glassy. But again, Hibari's patience was very limited and the hunger in him was clawing its way to the surface, he needed his kitten now.

After pleasuring his boyfriend a little longer, Hibari pulled away licking his lips as he took in the debauched form of Harry under him. There was something very arousing and satisfying to have such a powerful wizard under his control, completely vulnerable and undone. But his Harry was also beautiful, a treasure that he would never allow anyone else to gaze upon. Licking slowly up his lover's body, Hibari purred as he thought, "He will always be mine and should anyone believe differently then I shall kill them."

"H-Hibari," Harry mewed gripping the other teen's hair.

Pulling away from the delectable skin, Hibari murmured, "Kyouya."

"Huh?" Harry grunted as he blinked slowly, the pleasure of their current situation slowing his brain a little.

Hibari snorted, "Don't call me Hibari anymore. You're mine, you may call me Kyouya."

Harry frowned slightly before hesitantly whispering, "Kyouya."

Hibari smirked and licked a nipple growling, "Say it again."

"Kyouya," Harry gasped, arching.

"That's it," Hibari hummed in satisfaction his hands spreading Harry's legs while his mouth worked on his chest, "Keep saying it, tell me who you belong to."

"K-Kyouya," Harry mewed his face flushing with heat and satisfaction, his ears pressed back in his hair while his tail twitched and quivered. Pleased, Hibari reached over for a small bottle of unscented lotion that sat on the nightstand popping open the top. Kissing, biting and sucking on Harry's chest, Hibari distracted the other teen as he squirted the lotion onto his fingers and slicked them up, warming it a bit.

The first finger went in without any resistance although Harry squeaked and squirmed a bit, his nose wrinkled a little at the strange sensation. But Hibari wasn't willing to waste time as he added a second finger after several minutes and carefully stretched the virgin passage. Harry's brows furrowed in discomfort and he bit his lip slightly while his breathing picked up a bit, but otherwise he was fine. Hibari hummed in approval as he worked the two fingers in, scissoring open his body a little at a time. It was when a third finger joined the other two that Harry finally let out a sound, a hiss, at the sharp pain that jolted up his spine. It was expected but it didn't make it any better.

Hibari, feeling a soft moment for his kitten, leaned up and kissed him trying to distract him from the pain and discomfort. Harry mewed latching onto the reprieve as he kissed back while Hibari continued to stretch him, diligent in his efforts to spare the teen wizard further pain. But the process was slow and wearing on the skylark's endurance as he felt those warm walls clench and unclench around his fingers. It was only through sheer will power and effort that Hibari held steady.

"I'm okay... please."

The Cloud Guardian bit back a groan at those words and delicately slipped his fingers free, focused on Harry's face to discern any hesitance or second thoughts. But all he saw was lust and need in those green eyes that he secretly adored as they gazed up at Hibari. Assured, he found the lotion and only paused briefly enough to free his own cock from his pants before he was slathering a generous amount of slickness onto the straining organ. Again, Hibari wanted to avoid harming his boyfriend. When he was pleased that it was enough, Hibari tossed the bottle aside and shifted closer spreading open Harry's legs.

Guiding his erection to his kitten's entrance, Hibari leaned close and kissed the other boy hoping to relax and perhaps assure him. Harry purred his tail brushing against Hibari's leg. But the distraction didn't last long as Hibari pressed in steadily, neither too fast nor too slow, biting his lip as he forced open the ring of muscle that clenched around him. Harry hissed louder and tore at the sheets again in an effort to somehow alleviate himself of the burning pain. When he was sheathed as far as he could go, Hibari paused and the pair took deep breaths as they adjusted to the new sensations.

"Relax," Hibari huffed softly kissing away the tears at the corners of Harry's eyes. Reaching up, he tweaked one of the ears and scratched at it in diversion. Harry growled in annoyance but didn't dare move. It felt like hours before finally Harry's body began to relax as his nerves cooled and Hibari was permitted to move. His thrusts were steady and slow at first as he allowed his lover to grow used to the sensation.

Harry panted heavily and let out an array of sounds from mewls, to gasps and groans. This pleased Hibari as he watched the younger male unravel under him, his pale skin warming the faintest pink and his eyes became glazed over with satisfaction. It was when Harry wrapped his arms around his neck and held him tightly that Hibari quickened his speed, grunting at the assault of pleasure that overcame him.

His hands relocated to Harry's hips and dug into the soft flesh as he held his kitten firm, driving harder and deeper. Harry began to arch and moan as he spread his legs further and dug his heels into the mattress for leverage. Sparks flew and things rattled around the room, a few items even floating as Harry hung on for dear life while Hibari bit and sucked on his neck. Breathe, they could barely breathe it was so hot and the air felt so close.

"Mhm!" Harry mewed. It felt so good, the things that his boyfriend was doing to him. It felt good and overwhelming and the teen wizard thought he would go mad, he didn't want to stop. The cat in him was purring in satisfaction, it couldn't get enough. And all Harry could do was cling to the other, hold onto him as he was washed away in a tide of dizzying pleasure.

"Say it," Hibari ordered with labored breaths, "Say it again."

"K-Kyouya."

Hibari shifted and jabbed at his abused prostate as a reward. Harry gasped arching further, "Ah!"

The sensations and overpowering heat grew until it reached its zenith. The tension in their bodies which had been winding slowly finally snapped and uncoiled almost violently. One more well placed thrust to his prostate had Harry screaming as he dragged his nails over Hibari's back, releasing between them. The Cloud Guardian hissed at the pain and the addicting pleasure as muscles clenched around him and brought about his own orgasm, spilling himself into his lover.

The pair laid limp and exhausted upon the destroyed sheets, both breathing heavily as they rested, allowing their nerves to settle and the world to right itself. Hibari finally moved minutes later tenderly pulling out of Harry and settling next to him, pulling him close to his chest. Harry didn't mind as he sleepily snuggled into his embrace, his ears drooping. Finding the energy to smirk, Hibari reached out and flicked one of the ears, questioning, "How did you get these anyway?"

Stretching and yawning, Harry mumbled, "Animagus transformation… was my first try and I got stuck in between."

"Animagus… where a wizard can become an animal right?" Hibari concluded.

"Yeah," Harry replied his eyes closing.

"And you're a kitten?" Hibari teased.

Harry frowned and cracked an eye open, "I'm a cat… a British Bombay to be exact."

"Still my kitten."

"Shut up and go to sleep or I'm kicking you out," Harry threatened burrowing himself against the Prefect's side. Hibari continued to smirk before relaxing and holding the other teenager close, burying his face into messy black hair. Outside Hedwig and Hibird sat watching their masters as they slept without a care in the world. It was almost a sweet sight… until Sirius and Remus came home and discovered them. But that's a story for another time.

Yay! Finally updated this! Woo! -Insert happy dance- Sorry for taking so long, this chapter for some reason was giving me trouble. Maybe I just wasn't in a sexy enough mood? Lol! But in all seriousness, this was difficult oddly enough but it's done. I have a couple chapters after this that are finished too so you'll be getting updates at least once a week while I work further down the line. I'm mainly focusing on this story because it's actually almost done, I only have a few ideas left to write down. So I'll be working my hardest!

Hope you all enjoyed reading this, please leave a review and let me know what you think! Because reviews are love!

~Seth