Hi, everyone! Thanks for reading.

A few things worth noting:

- Kotoko and Naoki have known each other since childhood.

- Minus the previous point, this story takes place in the canon timeline of ItaKiss, and the moments mentioned in this fic are meant to be inserted there.

- There are also mentions of an underage character exploring their sexuality ON THEIR OWN (i.e. jerking off) and graphic depictions of sexytimez. So if that's not your cup of tea, move along. YOU'VE BEEN WARNED.

Enjoy!

Disclaimer: Itazura na Kiss, or any of its characters, do not belong to me and never will. Sob.

Kotoko Aihara had been a part of Naoki Irie's life for as long as he could remember. As try as he might, he couldn't recall a time in his life when she hadn't been a part of his life. In fact, if he had been a lesser, more dense mortal, he probably would have been convinced that Kotoko's mother had birthed Kotoko right as his mother was giving birth to him. Not that the possibility hadn't crossed his mind, anyway.

His first memory was of the two of them playing house in his front yard on an autumn day. His mother had been busy preparing snacks for the two of them in the kitchen, while Kotoko had busied herself collecting sticks for her makeshift "spaghetti," as the "mommy." Naoki had done his share as the "daddy" by finding a big, flat rock from his mother's garden (which she probably wouldn't be happy about) to plate the "spaghetti."

After the two of them had shared the meal—which largely involved the two of them surreptitiously tossing the twigs behind them as they made munching noises—he'd kissed her on the nose like he'd seen his own father do often to his mother, and tucked Kotoko and himself under a pile of leaves to "go to sleep."

Foolish Kotoko actually ended up falling asleep under the leaves, but Naoki couldn't help but smile. Wasn't that what mommies and daddies were supposed to do, anyway - sleep next to each other? Kotoko was just getting into the role, he supposed.

He took a real bite of a twig resting on the large flat rock, and spat it out. She could be a lovely wife to someone one day, maybe - but her spaghetti left a lot to be desired..

"Hey, Irie-kun, let's play mommies and daddies," a seven-year-old Kotoko had said, twisting her hair around her finger, not meeting his eye. She had developed a strange habit of blushing furiously and stuttering whenever their eyes met. Weird.

"That's for babies. We're not kids anymore." Naoki retorted, not even bothering to look up from his book. "Stop being an idiot."

Kotoko's eyes welled up with tears. "I… but… I like you, Irie-kun! I want to be a mommy and daddy with you!"

Naoki had flipped the page of his book. "First of all, the correct way to say that sentence would be, 'I want to be married to you.'" He scoffed. "Geez, you're such an idiot. When are you going to grow-"

Naoki never had a chance to finish that sentence, because Kotoko had poured her glass of milk over his head.

So of course, when she ran home, he didn't chase her.

But she was back the next day, to his mother's overflowing joy, smiling as if nothing had ever happened. Naoki, who had never been one to let go of a good grudge, didn't even acknowledge her presence.

After a few long minutes of stealing glances at Naoki, Kotoko stood up. "Irie-kun, I want to be married to you!" she said suddenly.

Naoki rolled his eyes. "As if I'd get married to someone as dumb as you." He instinctively flinched then, fully expecting another milk bath.

But Kotoko just bit her lip, trying her best to smile, while her eyes filled with tears.

"Yeah."

When Naoki was thirteen, his friend showed him a clipping from an erotic magazine that he'd stolen from his older brother. He didn't understand the sudden tightness at his groin, the sudden increase in his heartbeat. He'd quickly left for the bathroom to take care of the issue, thinking that he had to pee it out, but it was different. But not in a bad way.

And he wanted to feel that again.

So he waited until everyone in the house was sound asleep to take his shower that night. As the shower pelted his back, he re-imagined the clipping that he had seen at school – an older girl, her supple breasts looking as if they'd burst out of the tiny bikini top, her legs spread to expose the moist spot on her bikini bottoms, her eyes half-lidded, her mouth slightly open.

He found that touching himself somehow expedited the experience, and so he found himself experimenting: slow strokes at first, feeling electric, gaining momentum, leaving him on his knees, until he'd lost himself again.

He felt as if he should be ashamed, but decided that he didn't want to sully the pleasure he felt with an emotion so beneath him. He rinsed the resulting mess down the drain and never spoke of it to anyone.

However, as weeks passed, he found that re-imagining that magazine clipping didn't do it for him anymore. The girl that he had once found so exciting seemed so dull and predictable.

He'd looked around in school the next day to see if any girls at his school would do it for him. However, as much as he tried to fantasize the girls from his school in similar positions, nobody he saw had him feeling as taut and liberated as that girl from the magazine had made him feel.

So he decided to do some research of his own on his computer at home to find some images that would help stimulate his fantasies. He closed the door behind him, just in case.

Apparently he'd forgotten to lock it though, because he soon heard a plate drop and shatter behind him.

"Irie… kun? What are you…" Naoki quickly turned around to see Kotoko on her knees, having lost her footing in her shock.

The delicious fear in her eyes and her slightly ajar lips burned into his mind. He knew, then, that she would do.

She'd do just fine.

But first, he'd have to take care of the idiot's injuries.

The first time that the two of them had had sex, Naoki had walked in on an eighteen-year-old Kotoko touching herself after he'd kissed her at their class's graduation party.

"Hey, Kotoko, the bath is…" his words faltered, as his towel slipped from his grasp and onto the floor.

Before him, Kotoko lay on her bed, her panties at her thighs, with three of her fingers still inside her, her face flushed. A sheen of sweat glistened over her breasts, unhindered by a bra.

Naoki had closed the door behind him and locked it, which was when Kotoko actually realized that he was in the room with her. Her eyes widened and her mouth opened as if to say something, but no words came.

Rushing to pull her panties back on, she pulled her fingers out from inside her. But before she could protest, Naoki pinned that same hand down to the bed as he sat down beside her.

His eyes glittered dangerously. "What were you doing… Ko..to..ko?" he whispered out, enunciating every syllable of her name.

"I… I…" She tried to pull her arm away, but his grip only grew tighter.

Slowly, he moved across the bed, his body hovering atop hers. "And here I thought you were a good little girl."

Kotoko's face flushed, and turned away from Naoki's. "What... what are you doing?"

His bare chest pressed against hers as he pressed his lips against her neck. "Come on, isn't this what you wanted? I could've sworn that I heard you say my name through the door."

He hadn't. But even in moments like these, he loved teasing her.

Her deepened blush, however, affirmed that his suspicions had been correct.

Hah.

His fingers made quick work of her, replacing where hers had just been. To his surprise, he met some resistance when he attempted to insert a third - was this her first time? The thought made him want to shatter her to pieces.

She'd come undone as he finger-fucked her, grabbing onto the bedpost as a means of support. Then, she'd knelt on the floor and taken him in her mouth—his hands tangled in her hair—eventually swallowing every last drop down.

There were no emotions exchanged – just raw emotion.

Or so he'd thought.

"Just because we fucked doesn't mean anything, you know." Naoki murmured to Kotoko, on their first day of college, when she'd insisted on clinging to his arm.

At that, she'd readily relinquished her grip, but her steps had slowed down.

Irritated that she was falling behind, he looked back, opening his mouth to speak. But when he turned around, he saw that he was alone.

Where had she gone?

The second time they'd had sex, it was after the day that Naoki had gone on a date with Matsumoto. Naoki's mother had proposed a family outing, but had conspicuously ditched the two of them. While searching for them, Kotoko had wandered onto a bridge, but ended up being tackled by a pickpocket on the run. But before she'd fallen in, she'd instinctively reached for Naoki's sleeve, sending them both tumbling off the bridge.

"Irie-kun…" Kotoko said, while the two of them were drying off by the edge of the pond. "I knew it. You're more into the Matsumoto type, right? Beautiful, big breasts, long legs…" Kotoko trailed off, staring off into the distance.

Perhaps she had been imagining herself with Matsumoto's body, wondering how differently her life could have played out then.

She hugged her knees to her chest, staring at the sunset over the streetlamps were starting to flicker on now - the park would probably be closed soon.

"Hey, Irie-kun… it's getting late, so we-"

How many years had she been calling him "Irie-kun," already? She was on first-name basis with all of her friends, except him.

Unless she didn't consider him as a friend?

Well, what did it matter, anyway? She was an idiot.

Naoki gave her an irritated look before taking his shirt and pants off. Thinking that he was going to change out of his wet clothing, she covered her eyes.

But the next thing she felt was the softness of the grass against her back, with her wrists pinned under Naoki's large, warm hands.

She could feel his hardness against her belly, and swallowed hard.

And just as before, she relinquished control.

Naoki almost hoped that someone would discover them and stop him, because he'd relinquished control without realizing, too.

And he didn't like it.

The third time that they'd had sex, it was Kotoko's first time sleeping in the same bed as Naoki, at his apartment.

The two of them had discussed their futures – how Naoki had decided to pursue his dream of becoming a doctor, and how Kotoko had subsequently decided to become a nurse. Naoki had Kotoko to thank for discovering something that he was actually passionate toward for the first time in his life.

But appreciation wasn't what left his mouth.

Naoki rolled on the bed so that he was face-to-face with Kotoko. "You know, it's ridiculous how I'm lying in bed right next to you with you in my clothes, and yet I don't feel a thing."

He knew that he was hurting her, but he couldn't stop himself. Why was it always that way when it came to Kotoko?

Why was he always trying to protect himself from the best thing that had probably ever happened to him?

He expected tears, or a protest. But Kotoko didn't reply with words. She chose a simple gesture, instead: a firm kiss, on his forehead.

Something about that simple gesture set him off, and he found himself ripping his own clothes off Kotoko, his mouth kissing every inch of skin but her lips.

He pulled off her plain cotton panties, tossed them far away so that she'd hopefully have trouble finding them, and lapped up the nectar between her thighs. Just as she was about to reach her peak, he thrust himself inside of her. He relished her tightening around him as she whispered his last name.

And he'd continued thrusting, sucking on the nape of her neck as he took her from behind. Her breasts hung below her like ripened fruit, and he palmed them greedily as he rode out his pleasure.

The two of them had collapsed into the bed with him still inside of her, as he held her close to his chest.

But when Naoki woke up in the morning, all that was left of Kotoko was a hot cup of coffee awaiting him on his bedside table.

Twenty-two-year-old Kotoko had just come back from a date with Keita Kamogari from the nursing department.

Naoki had been waiting for her at the train station. It'd been fairly easy for him to figure out where she'd be exiting, since he had secretly followed the pair all day.

He couldn't believe it – Naoki-motherfucking-Irie, the most beloved and brilliant medical intern at Tonan University Hospital for as long as anyone could remember, was stalking his ex-stalker-slash-childhood-friend on her date.

What the fuck was wrong with him?

No, what the fuck was wrong with her? How could she proclaim her love for him countless times, fuck him three times, and then run off to another man?

Kotoko had finally emerged from the station, and Naoki stood in front of her, irate. She bristled in surprise, then broke their eye contact. He wordlessly opened the umbrella he had brought, and the two of them walked in silence all the way home.

Murmuring a thanks, Kotoko removed her shoes and headed upstairs to her room.

Naoki threw the umbrella near the foyer, kicking off his shoes.

He fumed silently, squeezing his eyes shut. Then, he could stand it no longer. Thank god nobody else had been home, or he surely would've woken everyone up as he stomped up the stairs. In a few quick strides, he found herself at Kotoko's door. Without knocking, he let himself in.

Kotoko, who had been in the middle of changing, whipped around to face him. "Irie-kun? Why-" She quickly reached for her blanket to cover herself up, but he snatched it away from her hands.

He silently glared at her, and he could feel her withering under his gaze.

"Kamogari? Are you fucking kidding me?" he finally spat out, after having locked Kotoko's bedroom door behind him.

She walked around him, put on a robe, and sat down at her desk, still silent.

Naoki followed her, and moved to slip the robe off her shoulders. But much to his annoyance, she flinched at his touch. He turned the chair around and grabbed her shoulders.

"Kotoko, what the fuck kind of game are you playing, here?"

Kotoko looked up, her steely gaze meeting his. "I'm so tired, Irie-kun."

"Of what?" he demanded, grabbing her chin.

No. Stop, Kotoko. Please.

She pushed his hand away, rubbing at her chin. "You just want to use me for my body. Because I'm here, and readily available."

"But Keita-kun doesn't. He actually cares about me, and he isn't afraid to show it. He doesn't just want to use me as his… fuck toy." She spat out.

Naoki froze. Somehow, those words sounded so wrong coming out of her mouth. His Kotoko's mouth.

He needed her to see things his way – the fact that, it had just been her for him, all along. The fact that he'd been aloof to protect himself from getting hurt, not realizing just how deeply he had hurt her in the process.

"But you still love me." He almost begged.

He heard her tear fall onto her desk.

"So what? You don't love me. And maybe Keita-kun-"

Fuck Keita-kun.

He felt himself moving. Then, to both their shock, he kissed Kotoko on the lips for the first time. She stiffened against him at first, but slowly melted against his lips, kissing him back.

Why the fuck had he waited so long?

He pried her lips apart gently with his tongue, and her tongue shyly darted out to meet his. Then, lifting her up from the chair, he laid her on the bed gently as he continued to kiss her.

He broke the kiss off briefly, and quickly removed his shirt and pants. Then his gaze met hers. Her eyes looked more alive, somehow. More alive than they had ever looked since they first time they had been together.

"Don't you dare talk about another man in front of me ever again."

She stared at him, still reeling.

"I love you, Kotoko."

Tears pooled at her eyes. Pulling his head down toward herself, she kissed him.

"I've always loved you, Irie-kun."

He kissed her nose, and settled himself between her thighs. Rubbing his nose against hers, he smiled mischievously.

"You want me, don't you?" he said, feeling his hardness being coaxed to life by the moisture he felt against his boxers. "You need me inside."

When she didn't respond, he kissed her chin, then her neck, then her collarbone. This emitted a moan, and her legs shifted from under him.

He'd never seen such an exquisite sight in his entire life.

"Say it. I know you want me."

She didn't say a word, her eyes screwed shut as she blushed furiously.

Naoki tried again, almost irritated. "You don't want Keita."

Kotoko didn't answer, still red.

"I guess you'll need some convincing, then."

The tip of his tongue danced down along her torso, trailing the moist path with kisses. Then, he took a finger and pushed it against her pursed lips. Without a word, she took it into her mouth and sucked. He pulled it out, eliciting another whimper, but he replaced his finger with his tongue as he took her mouth. The moistened finger, meanwhile, darted southward and teased her entrance. Kotoko arched her back with a sharp gasp.

Naoki pushed her panties aside with two fingers, then glided them along her wetness. Then, the two fingers gently worked against the core of her pleasure as his other hand palmed her small, firm breast. Kotoko moaned into his mouth, and Naoki could feel himself stiffening at the sound, but it wasn't time just yet.

"Let's start with two for now," Naoki murmured against her lips as he thrust his wandering digits inside of her. Kotoko let out a louder moan, arching her back and pressing her breasts against Naoki's face. Quick on the uptake, he took a nipple into his mouth and flicked it with it with his tongue.

The moisture was beginning to pool now. "How about three?" he whispered into her ear, giving her earlobe a light nibble. Kotoko, having almost completely lost herself, managed to shake her head no and slowly pulled away from his hand. Confused, Naoki looked at her but she smiled, reaching for the hardness concealed by Naoki's boxers.

He hissed at her touch. Fuck, that felt good. Kotoko quickly pulled down his boxers, coaxing him to lift his legs a bit so she could remove them completely. His hardness sprung out, and he settled it between her thighs.

She moaned at this newfound skin-to-skin contact, and involuntarily spread her legs a bit wider. Naoki's breath hitched at his throat.

Kotoko arched her hips upward, teasing her slick entrance against his hardness. He groaned. "Fuck, Kotoko. Can I..."

She nodded, and he slowly guided his tip into her, relishing the feeling. Kotoko dug her nails into his back, breathing hard.

"Kotoko, what's the matter?"

She shook her head, her eyes slightly wet. "Nothing, Irie-kun…"

He flicked her lip gently. "Stop that. Call me Naoki, already."

"Naoki… kun?"

And with that, he let himself sink into her. She clung tightly to him, becoming one with his body.

It was dizzying how tight she was. No matter which direction he moved, the only thing his brain could register was pure pleasure. He began slowly, teasing her by almost pulling out, and then slowly re-entering her. She began to relinquish her grip on his back, lay with her arms splayed by her sides and slowly moving her hips to meet his thrusts. Still, her adorable face was marred with signs of pain.

Dipping his head down to her chest, Naoki took one nipple in his mouth while taking the other in between his fingers. At that, Kotoko's eyes closed gently and her lips spread apart slightly, allowing moans to escape.

Naoki pulled himself up and began rolling both her nipples in between his fingers, still moving against her. He could feel the bedframe moving beneath them slightly as the speed of his thrusts increased.

"Naoki… kun…"

"Don't you ever tell me that you're seeing another man, ever again. You're mine."

She nodded furiously, gasping.

"Say it." He growled, his hips slamming into hers.

Kotoko met his gaze with a desperate look in her eyes. "I'm… yours… Naoki-kun…"

He felt himself stiffening up as he let out a groan. He was so close to the edge. The bed creaked beneath them, with the headboard now almost slamming against the wall.

Then, as much as it pained him to do so, he pulled out slowly.

Kotoko started getting up, protesting. "Why, Naoki-" but he silenced her with a kiss. Slowly, he made his way down her body with deep kisses placed on her neck, her collarbone, between her breasts, her rib, then her belly.

"Wait, Naoki-kun, what are you-" before she could finish, he placed the softest kiss on the nest of hair on her nether region. Kotoko inhaled shakily.

Naoki shot her a satisfied smirk, and then began to work.

He placed both his hands on her thighs, bracing them to ensure that she wouldn't clamp her legs shut. Then, he took a finger, dipped it into the depth of her moistness, and traced around her outer lips slowly. Kotoko gripped the sheets beneath her, her body bucking at his touch. God, every inch of her body was just so pretty.

He brought his mouth to her glistening entrance, and used his tongue to re-trace the path that his finger had just traveled. Feeling Naoki's hot breath against her, Kotoko shuddered in pleasure.

Using two fingers, Naoki gently pried her folds apart to see that she was sopping wet within. His eyes became hazy with lust.

Gently, Naoki placed the tip of his tongue near her entrance, and worked his way upward. He reveled in her taste, as he gave a gentle tap to her little bundle of nerves with his tongue. Letting out a cry, Kotoko lifted her hips toward Naoki's mouth to grant him better access.

"My, Kotoko. I didn't know you were such a dirty girl."

Years of enduring his teasing had instilled a sense of boldness into her. "I don't care. It feels… so good…" she murmured, grabbing his sandy locks.

Naoki felt the strain at his hips—a response to Kotoko's shamelessness—and smirked.

He buried his head between her thighs, swirling his tongue around the core of her pleasure, flicking it occasionally. Moaning, Kotoko moved her hips to match his movements. Then, he rose for a moment, and inserted three fingers into her.

"Mmm… Naoki…" she breathed.

"My… quite forward, aren't you? You graduated from Irie-kun to just Naoki, without a suffix, in a matter of minutes." he breathed against her wetness, as he sank his fingers deeper into her slowly.

"I… I…" gasped Kotoko, meeting his thrusts with her hips. He used his other free hand to spread her apart once more, and began caressing her clit with his tongue. Naoki quickened his pace, thrusting faster and faster, eliciting a series of moans from Kotoko. At imagining what she'd looked like now—flushed and almost undone at the mercy of his fingers and tongue—he could feel his pre-cum oozing out from his tip.

"Naoki… I… nnnnngh!" he could feel her hips sink back down to the bed, and her inner walls clenching against his fingers rhythmically. He pulled his fingers out slowly and kissed her thigh, before rising to take in the sight.

Kotoko's face glowed with post-orgasmic bliss, adoration in her eyes. Her breasts moved with each heaving breath, and her body twitched slightly with every wave of pleasure.

He gave her a quick peck on the cheek, and then flipped her over. Kotoko yelped, caught off guard.

"On your knees." He growled into her ear. "It's my turn now." His voice sounded dangerous, predatory. She obliged him, her backside facing him.

He was able to thrust into her much more easily this time, with her still being slick with post-orgasmic bliss. Holding himself upright by grabbing Kotoko's ass, Naoki thrust harder into her than he ever had. Kotoko struggled to keep herself up from the sheer force.

An animalistic grunt escaped Naoki as he let himself lose control, and he pounded into her from behind mercilessly. Kotoko moaned, enjoying the different level of fullness she felt from this angle.

Their hips moved in unison, building momentum together. Finally, Naoki's hands moved toward Kotoko's breasts, as he lowered his chest onto her back and enveloped her. He was so close now.

He gently flicked her ear with his tongue, breathing raggedly. "Kotoko… I love you."

Kotoko turned her head as far back as she could, with a small smile. "I love you too… Iri-Naoki."

That was enough to break him. Kotoko continued to move against him, milking his manhood. He rode out his orgasm inside of her, thrusting helplessly.

Then, with a guttural moan, Naoki collapsed on top of Kotoko. Her arms finally gave way, and she found herself flattened against the bed by Naoki's body.

He rolled off of her slowly, breathing hard, and Kotoko turned to face him. She hesitantly reached toward him, but stopped.

Naoki reached toward her, and pulled her to his side. "Where do you think you're going this time, idiot?" he murmured.

Kotoko blushed. "But you…"

"Shut up." He said, embracing her and burying his head into her shoulder. He could feel her reaching over to touch his back, gingerly.

Neither of them would have to keep count anymore.