Kyousuke pulled in one deep breath after another, hugging his knees to his chest as he gazed blankly into space. His body trembled like a leaf.

Just a few moments ago, he had been basking in giddy euphoria and now that feeling had flown away, leaving behind utter shock in its wake. It was crazy to think how quickly one's mood could change.

"Hey, you alright?" Rin leaned in, peering at his face. Kyousuke blinked, taking in the sight of his little sister. She was halfway through getting dressed, wearing only her underwear and shirt that was yet to be buttoned. He shuddered and shifted his gaze to the clothes strewn around the room. Part of him was screaming for her to pick up the rest of her clothes and put them back on. He couldn't bear seeing the evidence of what they had done.

Just what had he been thinking? Kyousuke was struggling to make sense of it all. He had defiled his own little sister and left a stain on her. This was the sort of thing that would affect their own lives, even their relationship with each other. Just thinking about the future had him paralysed with fear.

"What's wrong with you? How come you're acting so weird?" Rin placed a hand on Kyousuke's arm and felt him flinch. She withdrew her arm, regarding him with wide eyes.

Kyousuke swallowed, forcing back the bile. "Did we do the right thing? Maybe..." He put a hand on his forehead. "Maybe we shouldn't have done it."

"Huh?" Rin recoiled. "What are you talking about?"

"I'm sorry." Kyousuke's eyes welled with tears. "I'm sorry, I'm so sorry. What have I done?"

It had been a mistake, hadn't it? A horrible mistake. Perhaps it would be better to put it behind them and forget it ever happened. How could have done something that could ruin his little sister's life?

Rin frowned. "Do you wish we hadn't done it?"

Kyousuke drew in a long, shuddering breath and slowly exhaled. "I don't know. Maybe. Maybe we should pretend it didn't happen. We're brother and sister. Let's just keep it that way."

"Hmm." Rin tilted her head. "But you enjoyed it, right?"

"I..." Yes. He had enjoyed it. The thought made Kyousuke feel a bit ill. This was supposed to have been forbidden territory, but he had still breached it and now he wasn't sure if he had done the right thing.

"Well, I enjoyed it too. I don't think you did anything wrong."

Kyousuke raised his head, staring at her puzzled expression. Rin really was completely unfazed by all this. "Rin..."

"It would be a shame if we couldn't do it again. If you need time to think about it or something, I guess that's fine."

Kyousuke was silent, gazing intently at her face. After a while, he lowered his gaze. "I think I could do with some more time. This is a big deal, Rin. You know that, don't you?"

"Okay." Rin went around the room and picked up her clothes, putting them back on. She went back to Kyousuke, leaning over with her hands on her knees. "Um..."

"Yeah?"

Rin looked up, a light pink shade tinting her cheeks. "Could I... have one more kiss before I go?"

Kyousuke looked at her with doubt on his face, before leaning over to give her a kiss on the lips. He felt her press her lips back against his and heard the soft murmur in her throat. Then Rin pulled back and turned around to leave the room. Kyousuke watched her go, then brought a finger to his lips. It was strange. Even crippled by the guilt and fear, he had actually enjoyed that kiss.