Kyousuke waited by the steps, watching the front doors of the girls' dormitory. He had already been noticed by several girls coming and going, and they had whispered among themselves as they went by. No doubt they were gossiping about him having some secret girlfriend.

Well, it was certainly a secret alright, a secret that could never be allowed to come out. Kyousuke briefly glanced up at the full moon hanging in the sky, surrounded by a sea of stars. The cover of night could be a blessing, and they were going to use it to their advantage. He looked at the doors again and saw Rin come through. She looked around furtively before hurrying over to him.

"Hey." Rin greeted him with a smile. "You know, it would be a lot less trouble if we could just go to my room. I don't even have a roommate."

"Yeah, right. Even if I was allowed to come to your room, what would people think if I kept doing it? The whole school would start thinking I was a siscon."

Rin raised an eyebrow. "You mean they don't already think so?"

"Well, I hope not. Come on." Kyousuke looked around. The area was clear of students. He linked his hand with Rin's and they hurried behind the back of the building. Once they were within the cover of the trees, the two siblings were able to relax. They walked alongside each other, swinging their joined hands.

"It's kind of exciting." Rin had a big smile on her face. "Sneaking around at night like this, trying not to get caught, I think it's pretty fun."

Kyousuke looked at Rin, flashing back a momentary smile. It was only because they were siblings that they even had to do this, sneaking out under the cover of darkness, staying hidden and making sure nobody found out. There were times when his roommate was out and he would invite Rin over, but at other times they had to be a bit more furtive.

Their journey brought them to the boys' storage shack. As expected, nobody was in there. Kyousuke and Rin quickly slipped inside and closed the door.

"It's so dark in here." Rin sounded a little nervous. "But I guess we can't put the light on."

"Of course not. If the teachers on patrol saw, we would be in trouble. Anyway, it's a clear night so it's not too bad. You okay?"

"Yeah. I'm not scared or anything. You're with me so it's fine."

"Good." Kyousuke brought his hands up to Rin's face and gently cupped her cheeks as he leaned in for a kiss. He let his lips linger there for a while, savouring the kiss while it lasted. Rin pressed into him, a soft moan of pleasure issuing from her throat. He broke away, whispering. "You ready?"

"Mmm."

They lowered themselves to the floor and Kyousuke unbuttoned Rin's shirt. He ran his hands over her bare skin, slipping them beneath her bra and cupping her round breasts while kissing her yet again. Rin writhed underneath him, making further sounds of delight. Kyousuke brought his lips to her neck, kissing her warm skin. He kept going on down to her collarbone, listening to her gentle moans all the while.

Kyousuke sat up, reaching out to stroke her face, gazing tenderly down at her. In the pale light of the moon, he could just faintly see her silhouette. It was a pity he couldn't see her properly, but darkness was their ally right now. They needed it if they were to keep this a secret. He hastily slipped on the condom before easing down Rin's panties.

"Here we go." Kyousuke kissed Rin again, as he plunged into that forbidden yet delightful territory. In the cover of darkness, the two of them made love, clutching fingers and rubbing flesh against flesh. It was a sin, but it felt oh so good. Kyousuke kept his lips against Rin's, muffling her moans and cries of ecstasy, basking in the delightful euphoria.

When it was over, they left the storage shack, making sure that nobody was around to see them leave. The siblings made their way through the trees with smiles on their faces, occasionally glancing at each other. Soon, they reached the back of the girls' dormitory.

"Well then, I'll see you tomorrow." Kyousuke leaned in, giving Rin a peck on the lips.

"Mmm. You know, that was really amazing." Rin peered up at him, smiling broadly. Her cheeks were stained pink. "I hope we'll be able to do it again soon."

"Yeah. Me too." Kyousuke stroked Rin's hair. He was already looking forward to it, whenever it was. "Goodnight."

"Night." Rin turned away and headed back to the girls' dorm.

Kyousuke watched her go, then returned to the trees, making sure to keep in the shadows until he was safely back at the boys' dorm. One couldn't be too careful after all.