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Sora rubs the remnants of sleep from his eyes. The sheet rustles as he rolls over, feeling his skin burning and his pants uncomfortably tight.
It's that dream again; the one dream his brain should never come up with. Yet, recently, he’s been seeing the same forbidden scenario playing out in his sleep. Shiro—her fair skin bare, her soft little lips around him. He can't seem to get those sinful images of her out of his head.
The first few times it happened, he felt guilty enough to consider hanging himself. But, now? At this point, he can only hope that he’ll grow out of it. Maybe when he finally manages to get himself a girlfriend, he’ll be fulfilled enough that those dreams of him defiling his innocent little sister will stop tormenting him.
For now, he has to do something about his painfully hard cock. Yes, his sister is sound asleep next to him, but... Sora doesn't really have the mental capacity to think about shame when it feels like he could cum any minute now just from his tip rubbing his underwear the right way.
Eyeing his sister's sleeping face, he slides a finger under the band of his boxer—pulling it down and freeing his cock. It springs up and slaps his stomach, some precum already glistening at the tip. He runs his fingers up and down his length and shudders at the simple touch.
He starts giving it a few pumps and sighs, getting himself relaxed and comfortable. He checks on his sister to make sure she still has her beautiful eyes closed. She looks so adorable even in her sleep... Her cheek presses against the plush pillow and pushes her lips into a little pout. Oh, how he'd love to taste them.
“Shiro,” he calls, making sure she's actually asleep. There's no response.
He keeps watching her sleeping face even though something inside his head is begging him to look away. He knows he shouldn't be looking at his little sister while stroking his cock like the untouched virgin he is. But, she's just so enchanting... He imagines how it would feel to have her lips around his girth while her cute big eyes look up at him, waiting for instructions. His hand flies to his mouth to muffle a groan.
In his dreams, Shiro would rest her head on his thigh as she sucks the part of his cock that could fit in her mouth. She’d push herself and try to deepthroat him, causing her eyes to water. Those fantasies encourage him to pick up the pace and he can't hold back the throaty moan that escapes his mouth.
Shiro stirs in her sleep and turns to lie on her back, turning her face away. Sora can't see her face anymore and he's suddenly filled with frustration because he needs her; he needs his little sister now.
An idea born of desperation crosses his mind. “I’m so sorry for this, baby.” He grabs one of her hands and wraps it around his length.
Her palm, her fingertips—they feel warm. Sora uses her hand to give himself short pumps in a poor attempt to imitate a handjob. He makes sure to do it slowly lest she wakes up. But, it's not enough. He stops moving her hand up and down his cock and starts moving his hips to fuck into her curled palm instead.
He imagines it's her pussy; how wet and tight she would be. Sometimes, in his dreams, Shiro would want to be on top. She'd try to take charge, but she'd get tired easily. So, when she no longer has the energy to bounce prettily on her big brother's dick, he’d grab her hips and fuck into her like an onahole. The same way he's doing to her hand right now.
“I’m sorry, Shiro...” He feels himself getting close. “S-sorry, sorry… I just need you. Need your pussy around my cock.”
He groans and whimpers as he chases his climax. Before long, his toe curls and cum spurts into his little sister's hand, covering it with sticky white spunk. He bites his bottom lip to stop himself from moaning out loud.
Sora stays still for a while, coming down as he pants and catches his breath. He looks down to his crotch where Shiro's limp hand rests, dirty with his cum, and immediately regrets being born. He has to clean her up thoroughly after this. He doesn't dare imagine what she will do and how she will feel if she ever finds out—
“Nii …?”
It's as if blood has left his entire body. Dread comes over him and he feels cold all over.
Shiro's disappointed voice comes in a murmur. “If you need me, you should've just said so…”