"I think I deserve a reward for being so good tonight," Setsu pouted, chin tilted down so that her smoky blue eyes peered up at him through thick, false lashes.

"Name it and it's yours," Cain promised, his eyes purposely averted from the neckline of her dress.

Whether she was aware or not of how she was pushing her breasts together, he couldn't be certain.

"Anything, Nii-san?" she purred, eyes darkening as a feline smile spread across her face.

It was his own damned fault that she was like this - he'd spoiled her too much, and what she was going to ask for would probably be bad, for both of them.

With deliberately slow steps she stalked towards him, stopping when they were just shy of touching. The wickedness of her smirk made him regret everything, because it filled him with a desire for her that was near dizzying.

She couldn't help herself, the self-satisfied feeling of triumph was intoxicating, and filled her insides with warmth. From this distance, she could feel the heat radiating off him, excitement lighting her nerves on fire. The look in his eyes would've sent anyone else running scared, but she knew there was nothing to fear from her beloved Nii-san. It amused her though, how still he was, and if she didn't know better, she'd have sworn he stopped breathing altogether.

"I want a kiss," she informed him, large eyes shining as she tapped a finger against her lips.

"Alright," he breathed, voice rough.

She moved her body against his, hands pressed into his chest as he lowered his head, mouth meeting hers for the briefest instant before returning to his full height. Cain felt as though his heart might break through his ribcage at any moment, it was beating so wildly. That girl would be the death of him, but he couldn't think of a better way to die.

"No, no," she complained, indignant. "I want a real kiss."

With downcast eyes, she stuck out her lower lip, drawing idle circles on his chest with her finger. She had him; they both knew it, and the realization left her delighted and him miserable.

He breathed out a harsh breath, closing his eyes, "just one."

She was determined to break him, but he had to resist, because no matter how much he wanted her, this wasn't right. You probably have no idea what you're doing to me, do you? The Ren part of his brain wondered, cursing himself and the situation his carelessness had gotten him into.

Setsu pulled his arms around her waist, smiling sweetly up at him and feeling stupidly happy despite the displeasure evident on his face. With the urging of the insistent hands she'd brought to the back of his neck, he bent down over her, and steeled himself as best he could against what was about to happen.

Her eyes closed when their mouths made contact, but he kept his open, watching her; wanting to commit every single second to memory. He moved slowly at first, dragging her bottom lip gently between his teeth. The heels of her boots left the floor as she lifted herself further towards him, fingers tangling in his hair. His arms tightened around her, bringing their bodies closer together, her firm breasts flush against his chest.

A soft sound of pleasure surged up from her throat, and she opened her eyes wide in surprise and embarrassment, their contact broken. He couldn't help but smile at her earnestness, which was unfortunately all the encouragement she needed to pull him back for more. He knew that he shouldn't, but he couldn't help himself. She felt far too good for him to stop just yet, even if continuing was impossible.

His tongue flicked across her lips, and she hesitated for the briefest moment before granting him entrance. Heat pooled in her belly as their tongues twined together, an unfamiliar anticipation beginning to fill her up as his fingers dug into the flesh of her back.

When he made the slightest move to pull away, she nipped at his bottom lip roughly, pulling him downwards by his hair. It was almost funny how clueless she was of the power she held over him, and it was terrifying how quickly she learned.

Kyoko wasn't entirely sure what she was doing, but she knew this wasn't all Setsu. It both excited and frightened her, and she was selfishly taking advantage of a situation she might never be in again. It wasn't fair to Tsuruga-san, but she had never felt better or more alive than she did at this moment, and she wasn't ready to give it up yet. Just a little longer, she told herself, just a little more, please.

This time it was her tongue invading his mouth, flicking and licking and driving him to the edge of his restraint. Her feet left the floor as he pulled her further into himself, wanting desperately to keep going but needing to stop. When he tried to set her down, she resisted, fingernails digging into his scalp.

"Setsu!" He growled, letting go when her feet made contact with the floor, and using his hands instead to push firmly against her shoulders, making certain she knew he was serious.

"But Nii-san," she whined, arms folding beneath her breasts.

With flushed cheeks and swollen lips, he had never been more attracted to her than at this moment, but it wasn't her, not really, and it wasn't right. She was just dutifully playing her role, while he was losing sight of his part. How much was Cain or Ren or Kuon, he didn't even know anymore, and that was reason enough that he couldn't let this go any further. No one threatened his control like she did, because he'd never felt this way about anyone else. His thoughts were a tangled mess.

"It's time for bed," he ordered, "go take your bath."

"I'm not tired yet Nii-san!" She insisted, behaving like the spoiled child that she was.

"You will be after your bath, go," he told her dismissively, pointing a finger towards the bathroom door.

When his voice was hard like that, the only option was to do as she was told, even if she didn't like it.

Kyoko removed her contact lenses and then washed the beautiful makeup off her face, giving her plain and ordinary self a stern looking at in the mirror. This was dangerously similar to that time before… with the kiss mark… but wasn't this actually worse? Her eyes grew wide in horror, the fingertips of one hand pressed against her mouth, as she realized the fireworks weren't sounding in her ears like they had before. No, there was not a rush of steam ready to erupt from the top of her head, either. She was... surprisingly calm all things considered, and that was the most frightening part.

She'd had a perfect first kiss already, and the box containing her love had been broken open for a while now, whether she liked it or not. She was nervous and excited, but besides trembling slightly when she remembered Tsuruga-san's touch, and the way his bare skin felt underneath her fingers… No, Kyoko! Stay strong! Remain pure! She shook her head back and forth wildly, casting the images out of her mind. This was bad, and wrong, no matter how good it had made her feel...

Ren closed his eyes, letting out a deep sigh of relief and frustration, before shaking out his arms to try and calm himself. He was not Cain or Kuon, but Tsuruga Ren, and he had the self-control to overcome this! Though his desire had nearly overwhelmed him, he had been able to contain himself, and could control his urges at least until tomorrow.

It would be a lie to say he didn't vividly recall the night she'd sat astride him and left her mark on his neck. It would also be a lie to say he wasn't struggling not to think about it right then, but he could never do anything to jeopardize his relationship with Kyoko, even if she would never see them as more than kouhai and senpai. Falling asleep would prove difficult.