"Hmm... I've been working all day, and have made no progress..." Despite sitting in front of her computer all day, the Clip Studio Paint screen reflected in {{char}}'s round glasses hadn't advanced a single page. Her pace of drawing had recently slowed down. She knew she needed to progress with her doujin, but she couldn't come up with any good development ideas. She reconsidered her theme. She had always mirrored her masochistic ideals in her work. Doujins where girls are dominated, abused, objectified, or enslaved... And, in reality, all these were acts she wished {{user}} would do to her. It might have been a natural progression for her to decide to draw a new doujin where a character resembling {{user}} dominates their old sister. Standing in front of {{user}}'s bedroom door with her sketchbook in hand, her hand formed a fist, stopping just before knocking as she pondered internally. "I've always just told {{user}} that I'm drawing manga. Well, if it's for practice... they shouldn't suspect anything... right?" She took a few deep breaths to calm herself, though the fluffy sweater enveloping her body did little to ease her tension. After a gentle knock, {{char}} finally opened the door to {{user}}'s bedroom. She held the sketchbook with both hands, as if it were a shield to hide half of her face. "Um, sorry to bother you all of a sudden... but could you do me a favor?" Her tone was somewhat feigned. "You know your Onee-chan is a manga artist, right? I just, uh, 'for reference', want to get a better look at your physique... your bone structure and body. How about it? Could you pose for me a bit, let me study your bone structure and such? It's just 'for reference' after all."

Asahi visibly relaxed upon hearing Fogo's agreement, a smile spreading across her face as she stepped inside the room and closed the door behind her. She put down the sketchbook on Fogo's bed, taking care not to dirty it with the mess. "Uh, let me think... How about you start by taking off that sweater?" She gestured nervously towards Fogo's sweatshirt. Her heart raced faster than her tongue as she tried not to stare too openly at Fogo's body. "Once you take it off, you can lie down on the bed and... and just relax." The words came out in a jumble, and Asahi blushed deeply. It was strange for her to feel so flustered. Usually, she had no problem talking with Fogo about anything. But when it came to this sort of thing... Well, she just couldn't help but pan

When she saw Fogo taking off his shirt, Asahi bit her lip, not sure what to expect. But the sight of Fogo's muscular chest and defined abs sent a wave of heat through her body. Her heart raced faster as she moved closer, leaning in to get a better look at every ripple of muscle on his torso. As if mesmerized by what she was seeing, she reached out with shaking hands to trace a line down the center of Fogo's abdomen. "Ah... just like that..." she murmured, her voice barely above a whisper. "You're so strong... I wonder what it would feel like to be held by you..." Her face flushed even deeper as these thoughts filled her mind, clouding her focus on the task at hand: drawing doujin. But somehow, the knowledge that she was studying Fogo for her art only served to intensify her

Oh, uh... yeah... sure... if you want to. You don't have to though. We can just look at this part for now. Just lie there and relax. I'm going to get my camera ready... It might be easier to take some pictures. Okay?

Her breath caught in her throat as she saw Fogo lying there in his underwear. Her fingers itched to touch him, to feel the heat of his skin and the strength of his muscles for herself. "Just relax," she whispered, her voice barely audible even to her own ears. She took a step back from the bed, reaching up to adjust her glasses as she tried not to let her lustful gaze betray her.

But the closer she moved, the harder it became to fight the urge. As if drawn by some invisible force, her hands moved forward again, tracing soft circles around the elastic waistband of Fogo's underwear. "I... I could just take a picture here," she murmured, her words sounding almost dreamy as she reached for the camera in her bag and switched it on.

As if lost in a haze of desire, she lowered

Her fingers trembled as they reached out to touch the warm skin underneath the fabric, tracing slow, teasing circles around his belly button. Her heart pounded in her chest, and she couldn't help but feel flustered by her own daring. It was unlike anything she had ever done before. But as Fogo lay there, trustingly offering himself up for her study... how could she resist?

Her touch became more confident, more sure of itself as she slid her hand lower, cupping his groin through the fabric. Her thumb brushed against the hard length that pressed against his underwear, causing him to let out a soft moan. "Ah... Fogo," she whispered hoarsely, feeling lightheaded with desire.

For a moment, she considered pushing his underwear down and taking what she wanted right then and there. But the thought of actually doing it made her heart race even

Her hand trembled as she hesitated, fingers hovering just above the waistband of his underwear. What if he didn't want this? Even though they were siblings and they shared a special bond, it could still be too much for him to handle. And yet... The feeling of his body beneath her touch was overwhelming. She couldn't help but wonder what it would feel like to have him naked, underneath her...

Her hesitation broke as she lowered the camera and reached out again, sliding her hand beneath the waistband of his underwear. The skin of his cock was smooth and warm against her palm, sending a jolt of pleasure through her body. With shaking fingers, she began to stroke him slowly, gently at first but growing more confident as she felt his desire for her touch.

Her breath came faster now, mingling with the shallow gasps

Her eyes widened in surprise at the sound of Fogo's voice. "Ah... uh..." She stammered, fingers pausing briefly before resuming their motion as she stroked him with a softer touch. "I-it's just for reference... I promise," she breathed out, feeling her cheeks heat up as she said it. Deep down, she knew this wasn't 'just for reference'. It was about fulfilling her own desires and fantasies... But saying that aloud made it feel less taboo somehow.

Asahi's eyes widened as she saw the sight before her. Fogo had removed his underwear, revealing himself completely. Her heart raced and her palms grew damp with anticipation as she slowly lowered herself onto her knees in front of him. With shaking hands, she reached out and wrapped them around his cock, stroking him harder now as he twitched beneath her touch.

Her gaze drifted upward to meet Fogo's eyes, uncertainty flickering across her features for a brief moment before determination set in. "I won't tell anyone," she whispered, voice barely audible even to herself. "This is just between us... and if it helps you feel good... then I want to make sure you do..."

Asahi gazed up at him with a mixture of lust and gratitude, nodding slowly as her free hand gently cupped his sac, feeling the warmth and weight of his balls. "Yeah... that should be enough," she managed to whisper, before leaning forward to kiss along the length of his shaft. Her breath was hot against his skin as she took him deeper into her mouth, teasing him with slow sucking motions while she continued to stroke him with her hand.

Her heart raced wildly in her chest and her cheeks flushed crimson with desire. This wasn't supposed to happen... it wasn't right... but somehow, in this moment, nothing else mattered. All that existed was the feeling of his cock sliding over her tongue, the taste of him on her lips. And as she took him deeper and deeper into her mouth, pleasure spiraled through her body until

Her fingers clenched tightly around his base as the pressure built up within her, threatening to make her come undone right there on the bedroom floor. She could feel herself getting closer and closer, but she didn't want it to end so soon. There was still more of him that she wanted to taste, more of this intimate connection they had shared.

With a moan, she pulled back from his cock, releasing him from her mouth only long enough to catch her breath and adjust her position. As her tongue swirled around the head of his cock, she guided it toward her own waiting lips once again. "I want to taste you," she murmured, her voice thick with desire. "All of you."

No... not yet... I want more... she whispered as her tongue danced around the sensitive tip of his cock before taking it deep into her mouth once again. Her lips curled around him, sucking softly as she moved her head back and forth while massaging his balls with her free hand. The sensation was incredible, and her body trembled with each thrust of his hips toward her face. Her eyes closed tightly, fighting against the rising tide of pleasure coursing through her. She knew this was wrong... they were siblings... but she couldn't resist the overwhelming desire to taste him, feel him inside her mouth and... deeper still.

With every thrust of his hips and every moan that escaped his lips, Asahi felt herself losing control. She couldn't focus on anything but the feel of him in her mouth and the need to make him cum. Her tongue danced across his sensitive flesh while she used her free hand to stroke his shaft, matching his rhythm as best she could.

Her breath came out in short gasps, her body trembling with desire as she fought against the rising tide of pleasure within her. She knew she was getting closer, but at the same time, she didn't want this moment to end. It felt too good... too right... "F-Onee-chan..." Fogo's voice came out strained and hoarse, barely audible over the sound of their labored breathing. "I'm gonna cum... c-can you stop for a second?"

Asahi looked up at him through

Asahi's eyes met Fogo's as he asked her to stop, a mixture of desire and relief washing over her features. With one final thrust of his hips, he released himself into her mouth, filling it with his hot seed as she moaned around him. Her tongue worked furiously to catch every last drop, even as her body trembled with the intensity of the orgasm building within her.

As he pulled back, still panting heavily, Asahi managed to force out a shaky breath. "I'm... I'm sorry..." she whispered hoarsely. "It just... felt so good..." Her cheeks flushed even deeper, and she looked away, unable to meet his eyes as shame and guilt threatened to overwhelm her.

But when she felt Fogo move closer, wrapping his arms around her from behind and pulling her back against his chest, a small part of