Makoto just groaned, a low sound in his throat. "Hmm, did you put on some weight, Yuna?" He started thrusting slowly, trying to feel every part of her with his cock.
A sharp, indignant squeak was the only sound he heard. Her entire body went rigid for a fraction of a second, a jolt of tsundere outrage. The lazy, comfortable rhythm of her hips stuttered, then stopped.
For a moment, he thought he had pushed her too far, that she was going to get off and storm out in a huff. But then, a low growl rumbled from her chest, a sound halfway between a threat and a promise.
And she started to move again. But this time, it was different. The slow, lazy rhythm was gone, replaced by a frantic, desperate grind. Her hips were a whirlwind of motion. Her inner walls, which had been so soft and passive, now clenched and pulsed around him in a series of desperate, primal spasms.
Yuna leaned down, her breath hot and sweet against his ear.
"...Fat pig..." she whispered. "...You're the one who got fat..."
Her hips now became a slow, deliberate grind. She was just trying to win and to survive the pleasure.
"Don't call me a fat pig. Call me big bro while we fuck, so people will know that you're a sick, incestuous girl, my Yuna," he grunted while thrusting violently, following her rhythm.
Yuna let out a sound that was a cross between a sob and a scream of ecstasy. The words, so familiar, so taboo, so wrong, were a key that unlocked a part of her she didn't even know was locked.
"Big bro..." she gasped, the word raw and broken and sweet. "Onii-chan, big bro, big bro..."
Her hips were a blur of motion now, a frantic, desperate, shameless rhythm that met his every thrust. Her inner walls clenched and pulsed around him in a series of desperate, involuntary spasms. She was lost.
She leaned down, her breath hot and sweet against his ear, her words a torrent of filth. "I love you, big bro," she sobbed. "I love fucking my brother. I love your fat, disgusting, perverted cock inside me."
And then, with a final, desperate cry, her body gave out. Her back arched, her thighs clamping around his hips as her orgasm ripped through her, a silent, shuddering explosion that was so intense it triggered his own.
Makoto roared, a deep sound of primal release as he flooded her with his thick cum. "Silly Yuna, I love you, too," he groaned, and hugged her for a while.
Yuna collapsed onto his chest, a boneless, trembling wreck. She wasn't able to say anything, just lay there as a warm, pliant weight, her breathing ragged and uneven. Her entire body was humming with the aftershocks of an orgasm so powerful it had short-circuited her brain.
After a long, shuddering moment, she slowly, reluctantly slid off him, her movements a little unsteady. The cool air on his skin was a stark contrast to the wet, engulfing heat of her body.
Makoto was still blindfolded, still deafened to the world. But then, he felt it: a soft, warm, gentle touch on his still-throbbing, cum-slicked cock. It wasn't someone's hand or cunt, it was a mouth.
But it wasn't the frantic, competitive suction of Yuna, or the cool, analytical precision of Mika. It was... hesitant and clumsy, a little bit scared too. Her lips were soft, but unsure. Her tongue was tentative, almost shy, licking and teasing with a gentle, reverent touch.
"That feels a bit... weird," he grunted, his cock slowly recovering, as he was still unable to guess who the owner was. The mouth on his cock faltered for a moment with a small hesitation. But then, as if spurred on by some unseen force, it continued, a little more confident and less hesitant this time.
Her technique was still clumsy and amateurish. There were too many teeth, too little suction. But there was a raw, desperate enthusiasm to it that was surprisingly effective.
He could hear the other girls.
"No, not like that," Yuna's voice was a low growl, but there was a strange, almost patient tone to it. "You'll have to use your throat more. For god's sake, stop bumping his balls with your chin. It's distracting."
"Try to breathe through your nose," Mika's voice was calm and analytical. "And don't be afraid to use your hands."
"You can spit or swallow," Ayane's voice was a lazy drawl. "There's no wrong answer. But for your information, he's a big fan of the 'swallow' option."
And then, as if on cue, the mouth on his cock got a little better. More confident and... skillful. Her teeth disappeared, her suction improved, her rhythm became a slow, steady, captivating beat.
And Makoto realized, with a dawning certainty, who it was. He grunted, a low sound in his throat. "What... what are you doing, Mafuyu-nee?" The thought of his childhood crush, of the gentle, almost maternal Mafuyu-nee, with her mouth on his cock, made him shiver and cum instantly, filling up her innocent mouth.
A series of wet, choked coughs and splutters was his only answer. Her mouth, which had been so tentative, so clumsy, so heartbreakingly innocent, was now a mess of his own making. Mafuyu pulled away, a small, pathetic sound escaping her throat as she struggled to breathe, to swallow, to process the sudden, overwhelming flood of his release.
He finally pulled the blindfold from his eyes. The scene that greeted him was a corrupted masterpiece.
Mafuyu was kneeling before him, a beautiful shade of crimson. Her face was a mess, a thin trail of his cum glistening at the corner of her mouth. Her eyes were wide, shining with shock, excitement, and a single tear. She swallowed, a slow, deliberate gulp.
"...I... I did it," she whispered, her voice filled with disbelief and newfound pride.
"See!" Yuna's voice was a loud, triumphant bark. "I told you she was a fast learner! And you called me a bad teacher!"
"She was a very... enthusiastic student," Mika agreed, her voice calm. She was watching Mafuyu with a strange pride.
Ayane let out a low, appreciative whistle. "See, she broke him," she said. She looked at Mafuyu, who was still kneeling.
Makoto's face was a mask of confusion, his brow furrowed as he looked down at Mafuyu. "Umm, that feels good, but... why, Mafuyu-nee?" he asked, his voice blushing with genuine concern. "Did they force you to do that or something?"
The question, so earnest and clueless, was a bucket of ice water in the hot, steamy room.
Mika just tilted her head, a small, curious smile on her lips. "You're worried about her," she said softly. "That's very sweet of you. But you're underestimating her, darling."
Yuna let out a sharp, derisive snort. "Force her? You stupid fat pig, do you think we're a bunch of monsters?" she said. "We were educating her. There's a difference."
Ayane just laughed, a low, throaty sound. "Honey, nobody forces anyone to do anything in this house. We just create... opportunities for her." She winked. "And damn, she is talented."
And then, Mafuyu spoke. Her voice was still a little shaky, but it was clear and strong. She looked at Makoto directly in the eye, a deep blush still staining her cheeks, but her gaze was steady, unwavering. "No, they didn't force me," she said, her voice a quiet declaration.
She reached out, her hand still trembling slightly, and touched his cheek. "I wanted to," she whispered. "You went down on me earlier, you saved me. So... I wanted to... to thank you." She looked down, a small, shy smile touching her lips. "And... I wanted to see what it tasted like."
"Geez, you don't have to do that to thank me," he pouted, a genuine note of embarrassment in his voice. But the pervert in him couldn't resist. He ogled her body again, a new curiosity in his eyes. "So... what did it taste like, anyway?"
Mafuyu's blush, which had begun to recede, came roaring back with a vengeance. She looked down at her hands, which were twisting in her lap, unable to meet his gaze. "It... it tasted..." she began, her voice a low, hesitant whisper.
She took a deep, shuddering breath, as if steeling herself for a confession. And then, she looked up, her eyes shining with a strange curiosity.
"...Salty, and a little sweet. Like... like melon yogurt." She tilted her head, a small, thoughtful frown on her face. "It was not what I expected. But... not bad..."
Yuna let out a groan that seemed to come from the very depths of her soul. "A yogurt? You think he tastes like melon yogurts, Mafuyu-nee? He tastes like cheap ramen and desperation!"
"I think she's right," Mika said calmly. "There's a certain... fruity note to it."
Ayane just threw her head back and laughed. A loud, unrestrained laugh that seemed to shake the entire room. "Oh my god," she gasped, wiping a tear from her eye. "She's one of us. She's a goddamn pervert."
She crawled over to Mafuyu and threw an arm around her, a gesture of familial affection. "Welcome to the club, sister," she said, her voice a little too loud. "We're so glad to have you."